I live near Salzburg and I'm a musician.
Salzburg is a city of music with several professional orchestras and a world-renowned conservatoire. The place is heaving with musicians and students from all over the world.
Even here the only sheet-music shop in the city isn't viable. There was uproar about 3 years ago as it had to close with various petitions going on to keep it open. Basically it wasn't bringing enough money in to survive after paying the rent. It has now moved to a very small premises in the "Kunstquartier", has hardly any music in the shop to buy and is basically a place where people can go in, browse what little sheet music there is and then place an order with them for their online shop if they can't find the music they want.
When I first came here ca. 15 years ago I used to get the bus into the city, call in to the music shop and browse, maybe buy something (though the prices were extortionate even then), wander around for a bit, go to a nice cafe, attend to whatever business I had in the city and then get the bus home.
But it's all changed, and long before WFH and the pandemic and CoL. Why go into a music shop when you can sit at home and order any music online from the comfort of the sofa to have it delivered in a couple of days? I didn't have the time to go in to the shop to see if they had something (which they usually didn't) and then have to order it and then go back in again to pick it up 10 days later when it eventually arrived. The shop itself has expanded its online business too.
The online model has taken over and yes it's a shame but there's nothing you can do to stop it. I can send my students a link to a book to purchase and they can order it online easily (I do try to send them a couple of links to two different online shops, smaller retailers where possible). Similarly, my teacher just sends me links - just a couple of clicks from his WhatsApp message and the book is on the way, usually arriving in 2 or 3 days. I'm very busy too and I can order online at any time of the day or night, taking just a few minutes, instead of having to plan in a long trip into the city.
As a student I used to shop at Banks music in York - back in the 90s they had everything under the sun in stock, in cardboard boxes, and I ended up spending a fortune on stuff from there. But their selection gradually dwindled and they moved a lot online and are part of the musicroom. com family now.
Things have changed and businesses have to adapt to survive and if a sheet music shop can't survive in Salzburg that really shows how far things have progressed.