One could run the full solution on the phone, or have a backend hook-up, especially nice if installable via .deb or flatpak. Would be handy to use via app interface, keyboard dictation, TTS reader (right click menu option, Firefox Reader View, Foliate eBook reader)
A key enabler for especially the former would be if there was a way in the PureOS store to move/install to microSD card, as 32 GB was way to small even in 2017, but especially now.
Nonprofit OpenVoiceOS team in partnership with Neon AI are continuing to work on two parallel, but complimentary forks of MyCroft. One of the key engineers from Mycroft is also now working again on Rhasspy, this time now in partnership with Nabu Casa (HomeAssistant), they plan on releasing a MyCroft II successor.