The same can be said about everything we buy, nothing we use is really rated for corrosive chemical use. Replacement parts are just the cost of doing business.
Just like 12V aren’t actually putting out the gpm they advertise, most of the time a 5gpm 12v only puts out less than 2gpm with 200 ft of hose. Plus it has to be open flow or you will mess up the switch.
Ive talked to a few guys with boosters and one guy only runs them on his rigs and has had the same pumps for years. It just like everything else you just have to rinse it. As for reliability i cant say, even though a AODD pump may be more reliable you still have to worry about the compressor. With the booster you trade gas problems for electric problems. I dont like electric with water so that why im not a huge fan of them. But i would like one to be able to clean apartments with out disturbing everybody completely.
A booster would be easier to wash a house with over my small AODD set up because of the pressure and rinse abilities. So it really just depends on what your trying to accomplish with your set up.