It has more than enough ram, but the cpu and gpu will probably slow you down, but that depends on what you are used to :).

But it's sold out already.

Depends on what you put in the containers ;)

Yes, performance is very close to i5-8250U ( https://www.cpubenchmark.net/compare/3042vs5178/Intel-i5-825... ), which was release at the end of 2017. I have this in my laptop that I use for work, VM's, IDEs and containers are running all the time on my system.

Works great, even if I have all CPU mitigations enabled, turbo boosting disabled, and running in powersave mode. What I do to avoid the fan from getting audible. However, with all the options I mentioned enable (especially enforcing a strict powersave profile/max frequency/etc) you'll get a bit of latency here and there; which I can put up with because I hate to hear the fans spin. With a fanless design, a better power profile (6W TDP vs 15W TDP), I wouldn't constrict my CPU to such extents.

To compare it in relative performance terms, the Apple M1 is ~3.8x times more performant than it (if that helps).