@HalvarFlake Play-Fi kit (I think) are an option https://play-fi.com/products/
Less expensive but also BYO🔈: https://audiocast.io/
I have a Raumfeld One in use. It can do Internet radio and act as spotify connect device. Also useable via google home, but less reliable than spotify connect.
I bought it before the teufel merge. It is working flawless ever since.
It is only used as spotify connect device currently
@HalvarFlake I think the "integrated systems" ( a speaker that contains an amp and a little iot device that does networking, runs a vague Linux, connects to Spotify) will always depreciate very fast.
If you want to protect from that you can separate speakers (that are the same since the 70´s basically) from the amps ( that are the same since the 90´s if you use A/B amps) and the system. But then you enter a rabbit hole that you're not prepared to enter, even as an old IT geek, if I may :-)