I prefer Launchy which is very lightweight. But regardless of the tool, this is the best way to navigate your computer. I've literally forgotten how to get around to files and folders without it.
You usually can't fully self-host a mail server (like literally in your house) because most residential ISPs block port 25 to prevent spam/abuse. You can use a third party relay service like what Helm offered, but most people "self host" via a cloud provider or a web host.
Abagail Foy in Prey (2016)
That one chapter in Spec Ops The Line
The scenes where you go back to your childhood home in Wolfenstein The New Colossus
Firewatch
Might be too simple but does a traceroute show pretty standard latency all the way down the line?
I think that's what KBin is trying to address.
NAPS2 (Not Another PDF Scanner) does exactly one thing, scan stuff, and it does it incredibly well. Bypass all the garbage software that came with your scanner, plus it supports batch processing and profiles.