Re Squeezebox, it was the first streamer out (ish) made by Slim Devices. It was adopted by audiophiles, who promptly started modding it. They set up a forum and it became a thing. Slim Devices went the extra mile and made Transporter which was/is a real (pretty expensive) audiophile player. Then Logitech bought out Slim Devices and produced newer versions. Logitech are very good with software updates and support and the forum is full of tweaks.

Great product and a little cultish.

I'll leave comments on Sonos to owners but there can't be too much in it sound wise when you add a few tweaks to the mix. It would seem logical that they are both evolving to the same end point.

Tintin