I've not used a pico but other microcontrollers with c++ interfacing tools, and my thoughts are these things don't have interpreters onboard so the language choice is likely not that important. But I'm limited to TI boards.
Do you write embedded code professionally?
But I do as a side gig.
Me and a friend to small projecrts for smartcities like interative propaganda totens, wifi access points, smart traffic warnings. Things like that.
I also programed some small scale things in my last to job. One of them was a tamagotchi. I did not filmed the completed version, but I done a video testing the animations: https://youtu.be/fltoTmUJPBE
C++ is high level enough that I always assumed much of that work was already happening for microcontroller work.
So if you ever find that you need more performance you can drop into C, write a user module, and get the benefit of easier Python syntax and C performance.
The only reason some hardware features aren't supported is a lack of effort to expose those features. Come help us fill in the gaps! :P
[1] https://www.youtube.com/watch?v=437CZBnK8vI (Not my best presentation, I'm sorry; I was running on very little sleep and a high degree of stress!)
But it all depends of what you need to do with it. Like would I put python in something that someone can get hurt if it dosen't work ? Not. For things like just printing information in a OLED display? Sure, why not. Its easier to mess around with strings in python.