Force full sync

I had some issues with my home server, which was rathere sick, and so was I, at the hospital, so I couldn't do much about it. The result was two months of outage. I'm back now, nextcloud is up, no data losses, but no data has come in for months. It's obviously possible to manually upload everything, but it's a PITA and if all users have to do that manually, well, it's not going to happen, the way I know users. So, IMHO we need a way to do a full sync from time to time to cover this issue (and possibly a ton of others). I can only guess this has been discussed high and low, so I don't understand why it hasn't been implemented. Is it very hard? Does it take a lot of time? Will a monetary gift help?

Best regards

roy