https://www.messenger-matrix.de/messenger-matrix-en.html
^^ Good comparison with other IMs.
They look great! Is there a already an Autoeq profile that headset?
No, but openwrt seems to be available for some of their models if that is your question.
I think it's best to only buy routers supporting openwrt in the first place and switch firmware to openwrt asap. Openwrt or Opnsense or anything open source and well maintained will guarantee security updates years and years beyond the original manufactures firmware.
Here is a good overview. You could compare this with your findings:
Hitting a round birthday gets harder every time it happens in my opinion. On the other hand I didn't mind hitting 42 too much. After all, it's the answer to life, the universe and everything. That should be something to look forward to at 40!
There is no need fire up a dedicated machine to do this. Use your router/ap running openwrt and connect a hdd via usb. The machine needs at least 128 Mb RAM (256 mb would be better). Install the transmission package, set it up, add a gig of swap space on the hdd and you are good to go. The AP runs 24/7 anyways so there will be very few extra power consumption. Vpns often don't allow port forwarding (mullvad has stopped support recently if I remember correctly). You can just be a passive node and not often ports, that should work good enough. Consider seeding parts of sci-hub. it's a project worth supporting imho.
You can just download once of the parts below with less than 12 seeds and set it to host without ratio:
If you do not need the nfc cabability of your cards, just his them in front of a bright lamp, see where the cables run and cut the card with a scissor. Apply transparent tape over the cut and you have a privacy respecting card again. It's what I always do as my bank offers no service to disable nfc.
I get exactly the results for reddit.com and old.reddit.com
Maybe try the searxng matrix support chat, I think there might be a few developers around that could point you in right direction:
https://matrix.to/#/#searxng:matrix.org
They also have a Mirc support channel is that is more your cup of tea.
Another option would be to install an im server that is low on resources and not eating your sdcard. I think xmpp would work a lot better on a pi. Prosody, ejabberd or snikket should work nicely.