Got it in one.
Sounds perfect to my ears, tonnes of useful extra plusses as well, like mute/solo for each instrument, extra parameters for the sample-based instruments, 10 channel audio-over-USB so you don’t have to do the pointless Digital to analogue conversion, only to convert it back to digital again when you record.
My favourite feature of the tr09, though, is it’s limitation. I could scroll through libraries full of 909-ish samples and be too indecisive, so layer them up, then get to work so the phasing isn’t off, then maybe swap them out for other sounds. In contrast, by using a dedicated machine, you’ve got one kick, one snare, one clap, and one hihat, they each have some parameters to play with and they sound killer together.