Commercially speaking I know it worse than pointless! But please, be gentle and don't remind me. Neither bother about being insulting or patronizing because I ask such a 'stupid' question. Thank you for your comprehension.
The reason I'm wanting the - already four times over obsoleted - cpu mining is because I don't want to earn money with it. It's all about being curious about how Bitcoin works. Not an altcoin or something else. It's about learning about BC.
CPU mining is the only option left. Asic usb miners are sold out everywhere. Raspberry Pi don't support GPU mining, do they ? And I really don't want to buy a dedicate device - because I want to know how it technically works. Do CLI stuff to make it work.
If this wasn't serious to me, I really wouldn't bother asking around how to do it.
So, now that's out of the way...
Is it today still technically feasibly to do solo cpu mining ? (on Rpi3)
If not, how come ?
If it is feasible, is there an online guide, tutorial, ... I could use ?
- Optional: Why are people so reluctant about this ? It's not that I'm going to crash the BC system, am I ? :-)
It's perfectly fine to me to download the bulk data with a faster computer and upload it to the rpi.