I’ve just recently found out about ESPrensense [1], which does this, but running on ESP32 microcontrollers, so it should be much less resource intensive.
I imagine a part of the problem with the design of a lot of open source software, especially the more 'casual' or UI heavy kind, is the discrepancy between who makes it, and who uses it. Someone who uses LaTeX is likely to have a STEM background, so they're more likely to to contribute to its ecosystem. On the other hand, a Libre Office user could be pretty much anyone, someone with no CS knowledge, who doesn't approach using it in the same way a Libre Office dev might. Designers are the people who bridge this gap, and I'd love to see it done.
(This isn't meant as a criticism of Libre Office. That's just what first came to mind when I thought of a piece of open source software intended for a general audience.)
[1]: https://espresense.com/