Not much to do with maths unless you go into calculation heavy industry. Coding is just problem solving and reading bad documentation 95% 0f the time.

If you don’t want to be called there to always it support it, go for off the shelf solution. Both qnap and Synology offer the same. When i looked half a year ago, i saw Synology as being more expensive at the time so went with ts464 qnap.

Qnap do provide a roadmap of support for older devices. So you have an idea how long they will remain supported for.

I only need 1: ‘Undocumented “feature” generator’

Someone linked to what appears to be original post about it, its from 2020…

Once had an applicant with “Excellent Excell skills” on their cv