I have bought the TC22 after going on r/Soldering and can only stand by the recommendation, its an amazing iron for hobbyists and its ability to put tons of power on a tiny area quickly means basically its 100% easier to work with than a ton of cheap irons, and have a much lower chance of killing components than dicking around with less powerful ones and staying on the pin a long time trying to heat it up while it wicks heat away into sensitive electronics. Doubly so when I mess it up or the solder is not fully melted. Another nice thing is with powerful irons you don't have to overshoot the melting temp of solder as much, and tips with less thermal mass in general can be used.

Im a rank amateur so take what I said with a grain of salt. With that said, I have made several cool things in my life that many people've said I could charge money for. I guess you can't really see the mess I made when you can't look inside the housing :)

I've purchased it from the GEEBOON Store on Aliexpress (no affiliate or anything just looked up my order history):

https://geeboontools.aliexpress.com/store/1103439446

All being said you might not be comfortable with supporting the Chinese clone industry, and I can understand that.

any c245 will do (JBC is the best and original, but clones are close)

This is what JBC's marketing claims: https://www.jbctools.com/top10.html

Though from looking at some of the chatter about it online, this is only one specific tip they make under ideal conditions, and it seems like often they overshoot the temperature by more than a little on warmup (though this will be the slowest to recover with the tip just held in air as opposed to when actually soldering). Either way, I've used similar products and this kind of speed isn't a crazy suggestion to me.

Depends on mass/element power.

My TS101 heats up in like 3-4 seconds (330c) on a 100W laptop PD USB C. It doesn't have a lot of mass but it's perfect for microcontroller related stuff. Just not power electronics.

I can make no claims as to the brands mentioned in the parent post, but a 3 second heating time isn't all that fast for a real nice soldering iron. Previous job had an iron that'd heat between you picking it up and moving it over to the PCB. That one was stupendously expensive from what I heard, but I can only imagine that tech has gotten a lot cheaper since then.

Yup. They specify 3 seconds, but that's for 350C. In my experience, it's always at the right temperature by the time I finish picking it up.

It has a 240W power supply, so it's not just marketing.