So I have set up a couple of #tryton ERP systems including an integrated "e-shop" one of which I had updated on the occasion of #BlackFriday weekend. It's a great fully independent solution. No Amazon, no Shopify, no Etsy etc... If you need to do capitalism it is at least nice to do it without being beholden to some powerful overlord!
Anyways, on this Tryton e-shop I made a curious observation about the speed of payment processing on checkout. The transactions almost always process very fast...