Is it tacky to ONLY do online RSVP? It's hard to justify buying double the amount of stamps for return RSVP cards. Worst case scenario, we'll just offer both options...but then if everyone does it online I'll feel like so much money was wasted by putting the cards and envelopes with the invites! I don't think my family will care one bit if it's online only, but I don't know most of FH's extended family and I'm worried they will side-eye. I know as a guest it wouldn't bother me one bit, either.
What would you do? What DID you do? How would you feel about this if you were a guest?