As nitefox said already, you can start the steam deck on desktop mode and it’s already running Linux with KDE. My first thought when I read your post was also that Steam Deck could be exactly what you need. Plus they just refreshed it with better thermals, battery life, and display. A usb c dock would get you a pretty decent dev machine on a budget. Plus it’s great for retro gaming.
Should be the same across any instance.
Hot: calculated using the current score (up/down votes) in combination with how new it is.
https://github.com/LemmyNet/lemmy/blob/main/migrations/2023-10-23-184941_hot_rank_greatest_fix/up.sql
Active: calculated using current score in combination with the timestamp of the newest comment:
https://github.com/LemmyNet/lemmy/blob/main/crates/db_schema/src/aggregates/post_aggregates.rs