What can replace Sonos?

I have been a huge Sonos brand advocate for years. We have 12 speakers (including 1s, 3, 5, sub and playbase). All been rendered completely useless for months since the app simply does not work. System found? Nope. When it’s found, speakers connected? No way.

I’m considering selling the whole thing and starting over. This simply should not be happening at such a massive scale, for such a prolonged period of time.

What system can replace Sonos?