It has a ceramic igniter. Everything else is stainless steel. Cleaning out the fire pot takes a few seconds when needed.
Only takes a couple of seconds to clean the burn pot on a SF also.
I have had my EX4 since the start of December 2020 and use it 3-4 times a week (sometimes that much again on the weekends) with a mixture of Low & Slow and Hot & Fast. It has also replaced my gas grill.
After all this use, I am yet to see any signs of deterioration on parts or have had any issues (not even a failed glow plug or flame out).
It gets wet here, it gets humid here and I also keep the cover on it.
The only thing I can put this down to is the fact that I clean it out after each use.
I use drip pans for messy cooks.
I clean the ash out after every cook and make sure the burn pot is clean.
I empty the hopper after each use.
I remove the auger every 2 weeks to ensure there is no compacted pellet dust or damage.
This takes no more than 5 minutes to do (10 if you do the auger as well) so I see no reason not to.
There will be people that see no need for this and think it's a waste of time but there will also be people that spend longer than that sitting on the toilet reading posts like this.
As far as having to wait for parts... There is a thing going around at the moment called COVID.
Perhaps waiting for parts will be the only way it impacts you, perhaps not...