Just being sarcastic. I’ve owned a WRX and an STI and they were way more reliable than my A4 and Jetta, but that’s only because I took excellent care of them. Make sure you keep up with regular maintenance. Plugs, timing belt, water pump, coolant, oil, tranny fluid etc.
Find a stock BPV and get rid of the BOV. If you want to add a bigger turbo, find a Subaru VF34 or VF39. Both of those will make a modest increase in hp/tq and won’t be too hard on the driveline. Also, if the car still has a catted uppipe on it, get rid of it. A catless uppipe will give you the response of an n/a car with the stock TD04 turbo, plus you’ll get 5-10hp/tq and won’t have to worry about the cat falling apart and destroying your turbo.
Join unysoc.org for any questions you have. That’s the local Subaru community. They are a great bunch of guys and will be more than happy to help you out.