I see this discusion it's for US people, but let me give you a few insights about how I see things about B&M shops today, since the closing of stores in the US has seen a lot discusion topics lately.
Here in Chile we have only a few hobby shops IN THE COUNTRY, in the capitol ( Santiago) 1 big and 2 smaller ones, plus 3 or 4 in other cities. And the big one not only caters plastic modelling, its main bussiness area it's RC stuff and a regular toy store, but their selection of plastic kits and supplies it's quite respectable. They also have a discount policy of 20% to registered members in kits. They are the representatives in the country of Airfix, Hasegawa, Miniart, Revell and Hobbyboss, which are really cheap even considering the distance (we can get a Revell or Hobbyboss at least 30% cheaper than in the US, I speak knowingly since I sent to the US for vacation last year and my wife let me go to a few model shops there). They also have Tamiya, Italeri and Dragon sourced elsewhere (and much more expensive that the other mentioned brands). And a few other more obscure brands are also available, but no aftemarket. And they also sells in country through their website. And they have been doing it for at least 20 years and the bussiness model must be working OK or else they should have stopped selling plastic kits.
The other shops are smaller, but sell the same brands plus Academy and Trumpeter at very good prices generally, and also have supply specialties lile Ammo of Mig, AK Interactive, Vallejo, etc. They do not sell through internet but take special order from customers through e-mail and facebook. So again, the bussiness model must be working since they've been in the market for quite a few years.
Now we even have a local manufacture of wxcelwnt quality paints and weathering products K4, which have been steadily expandinf its line theought the last years.
And in the city I live, Vińa del Mar, a new store started, small bussiness of youger guys, which focus mainly in Gundam and related science fiction, role playing and has modelling supplies in good quantity and quality (Tamiya, Ammo of Mig, etc). They also sell through internet and Facebook and take special orders if you want, obviously charging a bit for the service. And again, the bussiness model must be working since they've been in the market, again, for a few years now and always have something new.
In other cities we can find plastic models, but embedded in a traditional toy store or associated with collectibles, die cast snd stuff like that.
A few years back, we only could get modelling stuff online or in s few selected places in country, now we have more options to actually see the kits if you want, get the needed paint or glue and get knifes and other stuff. And aftermarket and the new brands that have come in the last years have to be sourced online.
With all that said, I see the problem for US modellers it's that B&M shops it's that have not evolved with the current trends. maybe the solution it's to expand their bussiness IN the hobby area (RC,roleplaying, regular toys, whatever) with a section being plastic modelling , conducting better client oriented service (discounts on registration, regular sales), selling locally through web sites, using the tools of social media (facebook, twitter, instagram, etc. ) as an integral part of their marketing strategies, establish a better integration with the importers or the manufactures to cut prices (trying to avoid the middle men as long as you can) and try to get rid quicky of their inventory to avoind keeping cost. Otherwhise, all B&M shops are doomed to die sooner or later if they not adapt. My call is that inefficient logistics on the shops side (including an outdates bussiness model) and a bit of greedy in the middle men have cause you the problem with local B&M hobby shops.
Now, As I said before, I've traveled to the US a lot last years, and always try to take the chance to go to a B&m shop, to look for that things that cannot be found In my country. As for prices and exception made about the brands named before, prices are more or less on par of what I can find in Chile, but the selection I found it's much better.
I'm speking with the view of a 36 years old guy who has been modelling since I as 10, so I can say I'm not old fashioned and more than willing to accept new way to fullfill its hobby needs, plus dealing with the traditional way of shopping.
The market allows for everyone to have a share in it, being online shopping, physical shopping, etc. all in out addiction benefit
My 0.02 cents worth
Cheers