Make way for the future....

I use a one box for all solution, the Lyngdorf TDAI 3400. I find it does almost everything I need. It always allows me to feel delightfully emotionally involved with the music.
The streaming function built-in works great for Int. radio and for general listening from Qobuz or local music, but adding the Bricasti M5 connected to the USB input of the Lyngdorf brings an even greater connection to the music that I love.
so a £5000 one box solution can still be improved upon significantly  by adding a £2500 (+ £595 USB) streamer!

@mapman Good to know this category continues to grow. More options leads to better pricing and fit for each use case. I’m a believer in these integrated one-box solutions as a stepping stone to the future. When we look forward in time, and I’ve been saying this for many years, where we are headed is everything will eventually be on the speaker cabinet. I see a future where each driver has integral amplifier specifically designed to work as one in complete harmony with driver physics. DSP crossover and DACs receiving, directing and converting wireless signals of audio streams, and potentially phono with built-in wifi (for the vinyl lovers). Topologies with no cables, keeping the signal digital to within inches of the drivers eliminates the possibility of cable and connection noise and maximizes efficiency. Speakers capable of flat linear full-range response. DSP means the user can tweak and adjust output properties however they wish, in real time from myriad devices and correct (automatically) for room response. And here’s the kicker... all elements needed to make this ’future system’ exist already. There is no technical obstacle remaining to overcome. It’s only a matter of time now, time for the industry and consumers - our slow minds - to accept this eventuality. The real question is, why do we (humans) clutch old ways. Is it because of our investment in the past, tradition, conspiracy, fear, or something else?

see a future where each driver has integral amplifier specifically designed to work as one in complete harmony with driver physics. DSP crossover and DACs receiving

This already exists, it's in the speakers I use.

There are some wireless using WISA but it has a way to go. 

Would be curious to hear one. Like the aesthetic of it. Harkens back to the A&R Cambridge A60 with the wooden side panel, black front. 
The “all in one’s” of their time. 

I replaced an Audio Research LS26, Chord Power amp, and rega DAC in my 2nd system, with a sim audio 340X.  No drop in performance overall.  Separates did a few things better than the one box.  One box does a few things better than separates.