Pretty much all of the advice regarding panels here revolves around the idea of heavily oversizing your breaker panel to avoid running out of spaces and to avoid needing tandem breakers. Especially given new AFCI requirements for pretty much everything except dedicated loads, it seems like tandem breakers are decreasingly useful.
Are there any particularly good applications for tandem (or double-stuff) breakers, including triplex and quad breakers?
As an example, I have a solar setup backfeeding a 20A 2-pole breaker. I also have a solar production monitor that requires a 2-pole breaker, mostly to sense voltage to accurately track power. It seems reasonable, given the related nature of the two, that I could save two spaces in my panel and put both the inverters and the monitor on a quad breaker (2 2-pole breakers in 2 spaces).
Similarly, I have and electric cooktop and wall oven. I can get quad breakers with 20A/40A setups that would replace the 20A 2-pole and 40A 2-pole currently serving the oven and cooktop, respectively. As another related set of loads, this seems like it could be a reasonable use for these style of breakers.
I understand that panel space can be a reason to use duplex, triplex, or quad breakers, but I am specifically asking about situations in which you do have ample panel space.