Been doing this with road chains and a hot pot for 15 years now - and if you use ski wax instead of paraffin it doesn't flake off in the cold.
Honestly, that's not an issue for me, as I never ride bike when it would be cold enough for this to be problem
For me, it needs to be warm enough, that I can ride in shorts (ok knee warmers are fine), but that means no issues at all with paraffin flaking off, even though during yesterday's ride, I ventured slightly too high, and actually needed to go for some 2-3km on trail that on parts still had 30cm snow covering it. Certainly way more fun doing that on skis that on bike
But I was actually thinking that using some HF waxes would be even better, as I'm sure fluoro would help here too. Too bad I don't feel like bothering and 0.5W that could be gained with that, doesn't mean anything to my mountain biking
Also, one other consideration for parts shortages: raw materials (especially steel, slightly less aluminum) are in short supply worldwide right now. So if a component maker can't get the raw materials to make cogs, cables, chains, screws, rivets, etc. they're somewhat... screwed.
This is what I actually mean with my first post. All of a sudden, there's huge shortage in pretty much everything. Bike parts, steel, nowadays computer chips and at least for that last one, excuse is super lame... few hour power outage. Sure it can happen, but I somehow don't see how few hour power outage in one factory can cause computer chips shortage worldwide for months. But I assume COVID is nice excuse to create "shortage" and hike up prices for everything, what before couldn't be done this easy.