First off welcome to the community.  As a community forum of other users, you might want to take your foul language elsewhere.  You do seem more intent on being ‘outraged’ than actually wanting assistance, so I’ll just say that wanting a refund on a product you clearly state you bought 10yrs ago is totally ludicrous.  

Wow… after taking the time to speak with Sonos colleagues at length and attempting to do exactly what they recommended which took weeks to fix a product that I have invested in and all I am receiving is this insensitive and frankly patronizing reply!!  Give me a break… how about some useful information mate????? 

Ok I’ve deleted my earlier response and will try a different approach. though I doubt ui will able to fix  your problem.   I don’t  mean to be patronising but we are all struggling with some issues of the new app to some degree.  And if I can be frank, your approach is poor.  You didn’t ‘invest’ in Sonos, you bought it.  It is 10yrs old and you have continued to receive firmware and software upgrades throughout that time.  I can’t think of a single piece of connected tech (and I have a lot) in my house that is of that age and which continues to receive support.  I wouldn’t dream of running Windows on a 10yr old PC or the latest Apple OS on a 10yr old IPhone.  I get that you didn’t ‘ask’ for the latest upgrade, but the Play:1’s are a world away in tech terms from the current products; they have very limited memory, which in many cases in failing.  My own Play:1s I traded in just this year for just this issue (check if you have a trade in voucher in your account).

Your play:1 could be probably made to work.  Many people have had issues with accessing their local libraries due to the hosting device using SMBv1 which is no longer supported.   You don’t state in what device your music is stored but if it is a NAS which is as old as your PLAY:1 this may well be the case.  If your music is stored on a a PC or a Mac then quite likely you need to change the setting of your shared folder.  There are plenty of messages on this forum where people explain this process so your best bet is to search for those.  
Personally I would wonder whether I think it worth holding on to a product of that age, in terms of how long you can realistically expect it to support the weight of the firmware that it expected to run.

good luck.  
 

Andrew-s,   Your are missing the point. Many of us with older systems were quite happy with them and to continue with them as they were.  Not interested in new Apps and hardware firmware updates being forced on us  if they are going to kill the operation of our existing systems, which effectively they have done. I would gladly do without any ongoing Sonos "support" (I use the word loosley) if this is the result.

Yes, I'm using an old NAS SMBv1 which is not accessible from the Internet and my PC has the latest Window security updates and I run Kaspersky. In my opinion I am at close to zero risk of any security issues due to SMBv1 on my NAS.  In any case it should be my decision if I want to use it or not, not Sonos's.

Why can't Sonos allow us to revert to using the previous App albeit with no further on going support or updates, as they did with S1 (eventually....)?

It’s not about music anymore. Sonos is attempting to make it all about Sonos now. 

Andrew-s seems to favour junking functioning hardware just because it's a few years old. This throw-away attitude is  apalling when maintaining equipment ISA part of trying to mitigate the climate catastrophe.