Looking at payments for Pinboard for this year, it's about a 50/50 split between Stripe and PayPal. Integration with the latter is painful and unpleasant compared to Stripe, but there are a lot of users (international users especially) for whom Stripe is not an option.
I also like not having a single payment provider have the ability to cut off my revenue if some kind of issue arises. For that reason I would avoid integrating PayPal via Stripe even if that option were offered.
I would like to have multiple options for that reason, but right now we have Stripe integrated with Taxjar (Stripe owns Taxjar) which handles all our sales tax calculations and filings. If we add paypal separately, that would throw a huge wrench into that whole system, unfortunately.
I also like not having a single payment provider have the ability to cut off my revenue if some kind of issue arises. For that reason I would avoid integrating PayPal via Stripe even if that option were offered.