Purifi v Gan amps?

They are both unproven technology.

Why would you choose something like that when there is plenty of choice of amplifiers using time proven design and components?

The latest and greatest is very often not the greatest.I know people who have been using  and building Class D amps for at  least a decade and they do not like the  sound of the Purifi modules.

So if you ant Purifi amps to have a sound you you use an op amp buffer with a sound?

Why not just use an op amp based amplifier like a LM 3886 and avoid the cost of the Purifi module?If you need more power just parallel multiples of them.

Although from what I have heard Purifi amps do have a sound and it is characterised by by sounding veryclear and detailed but also quite flat/2D and having very poor timing and musical communication.

I had one on loan for a while.So from what I have heard is literally from what I have heard.It was a March Audio with no aftermarket op amp buffer.Tried it with a few different preamps and digital direct and a few of my speakers and could not get it a complete sound out of it.It is good in some areas like detail but poor in others like imaging and has poor timing so there is no flow or expression to the music.