I can second that.
I have the SONY A10 the M10 and the D100
Own the D100 for a while and it’s absolutely great sounding recorder. I don’t miss the mic inputs with recordings sounding this good with the built in mics. And i don’t like to carry too much stuff on me for field recording.
I got the A10 because i wanted a recorder that is always in my bag.
And recently got the M10 because i could get a good deal for a second hand one and was curious about it.
I recently did a comparison between all of them.
D100 is clearly the best,
M10 comes close.
A10 is quite noisy with the inbuilt mics for low level sources and has a totally different feel in the sound.
I also compared them using DIY mic’s based on the same capsules as the USI’s.
I noticed the A10 is much less noisy that way. The preamps and the converter actually sound pretty good.
It’s a huge difference with the built in mics. And the difference with the M10 and the D100 is much smaller.