I did this when I was still by myself, but a) having family and b) having more and more micro transactions (like coffee, transit, lime scooters…) and c) more and more accounts (amazon, paypal) means I had to declare time bancruptcy meanwhile

I completely understand since I have a wife.

But we do not do a lot of micro transactions, so it still works.

Once it doesn't, I'm hoping that the cards and bank accounts we use the most will export the stuff into a format that GnuCash can use.

LPT: If you do switch to importing use CSV, not QIF. A lot of (i.e. all but one of my) credit card companies have two "description" fields, a short one and a long one. The OFX usually only has the short one, leaving you with often cryptic entries; things from Stripe and PayPal often get truncated before the name of the vendor upstream of them, making them impossible to decipher.

Oh, goodness, thank you for that.

I do the same (ledger, not GnuCash). A few minutes each day. I used to outsource (part of) the work to my daughter when she was ~8yo (and paid her for that) to teach her that work is where you get money from.