This is my solution as well. It is worth remembering however that unlike paid services you are on the hook for your own backups. Not really a downside IMO, but something extra that needs to be done.
It is probably an old case design. In the early water cooling days, there would be separate watercooling units that sat outside the case. The grommets were so you could pass your tubing through.
I wouldn't really worry about the dust tbh, you will wind up having to clean it regardless.
Unfortunately, the current screen it uses is not being made anymore. People have stated that they have gotten other screens to work, but no official instructions on using them yet
I work at a big box hardware store, and I can confirm that almost all deck and structural screws are moving to torx. (much to the older generations dismay)
Tbh 99% of the hate for hex is probably because Allen keys exist, and are included with everything. Those things are just pure hell. Hex is fine if you have proper drivers for it, but a lot of people don't.
Note: Speaking as someone that lives in America, I'm sure the rest of the world has already solved this.
I was in the same situation, but luckily, Starlink became available. Not as good as a wire, and rather expensive, but damn is it a night and day difference.
Until you find out that a usbc plug fits inside a usba port and you can mix them up when reaching around your computer. (Don't test this on anything that is powered on, I did it on accident once and it triggered my motherboards usb overcurrent failsafe)
I'm in this comment and I dont like it