It has been a while, good to see TMO still rolling.
I have been daily driving Mobian first on a Pinephone, since my N900 put a red slash on the SIM in 2020, and lately a PPP.
Other than the miserable battery drain I really like having the ability to use websites which faded away as my N900 aged. I can do most anything I need on my mobile, especially with, the debian desktop apps, flatpak, and use of appified websites. I feel like the problem is unline the N900 there is not hardware abstraction layer for the system so too much graphic processing is done on CPU and the custom Rockchip CPU is plenty capable but if forced to do that work bo surprise it burns battery at about 3-4W even resting.
There are still some issues like integrating cameras(libcamera and pipewire config) on the Pinephone pro but overall except for the very short battery life in use I am really loving the Mobian on PP and PPP.
How is the Lest daily driver experience going?

If you have Pinephone Keyboard then Leste would be better with Pinephone. You Battery life is enough if you remember charge everynight and if it is heavy in use (streaming videos) over 8 hours in day, you should little charge when you take brake. And you have to take brake even you charge all time, because with Pinephone Keyboard charging speed from Keyboard side battery to Pinephone side battery is little slower than what "heaviest use" uses battery.

All though Leste is quite good with Pinephone, there is some things that can go better, example changing phone call volume during call you have to use Pulse Audio Volume Control. SMS messages works, but MMS not. How about Mobian those things?