Yes, it is rather strange to say that a plane designed for interdiction won’t have to deal with missiles because those missiles aren’t near the battlefront.
Also, I wonder if the Kub (Sa-6) or Buk (Sa-11) are easy to defeat at low level by the A-10 or only by F, E or E/F planes using the more sophisticated forms of ECM.
The bit about stealth going out the window when you’re in eyesight makes me wonder: How much do low radar observability features degrade tracking/fire control radar in the X, Ku and K bands when only a few KMs away? Do common manpad missiles tend to be smart enough to have a good chance against flares and DIRCM?
It doesn’t seem that the A-10 would do well against the 2K22 Tunguska or the Pantsir-S1. It isn’t designed for their 30mm autocannons and their missile warheads go from 9kg to 20kg which is significantly more than the SA-7 or SA-16 while admittedly well short of the S-300/S-400.
Overall, it seems rather easy for enemies to switch to 30 to 40mm autocannons and 10 to 20kg warhead-missiles. Plus, those autocannons could be quite useful as infantry support, especially in urban warfare. The missiles might, perhaps, have some use against non-MBT armor at ranges of several KMs.
A lot of the enthusiasm for the A-10 reminds me of the fondness for battleships; Highly specialized big guns on platforms which have an obsolescent reputation for survivability against sophisticated enemies and which can be easily replaced by multirole platforms against unsophisticated enemies.
Also, easy to engage in Top-Gun-shower-scene-level, macho swagger about. Of course, nobody would engage in macho swagger about weapons, especially not on Internet.
Don’t get me wrong, I like the aesthetics of battleships and the A-10 too; I like big guns and I cannot lie. But it doesn’t make much sense to argue that they shouldn’t be replaced by nimbler, lower observability multirole platforms. Don’t worry, you can still geek out about weapons; Just learn about EW like I (obviously, because I keep bringing it up) did.