I don't think any waterproof shell with any breathability will last years of high frequency use.
You got 3 main techniques to last years
1) use an umbrella, cheap and very breathable, there are quite some tough ones out there, you can repair with some tape and a bit of wire.
2) use windproofs and your own body heat to keep light damp out
3) the actual waterproof you have kept in your pack for those situations 1+2 above won't apply (too windy, need both hands, too heavy rain).
4) Ponchos are not breathable don't need to be as as they basically are wearable umbrellas and as the fabric can be thicker, will last a long time.
Note the above are all old-tech and relatively cheap, is that why they are not sought-after?
Paramo - it can be cleaned using clean water and Techwash, you don't need to reproof it (TXDirect) as often as you need to Techwash. I hand-wash mine wearing plastic gloves, you certainly can do on a long outing with a suitable container, and if you don't to use Techwash then soap flakes like for washing children's clothes is just as good and lighter to carry a few flakes.