While as a general principle I prefer e-tickets, I just had an experience with a DONE4 that is giving me pause for thought. I have a paper ticket on BA stock ex-BKK that I needed to have reissued. Earlier in the year I missed a few segements due to time constraints (including a DFW-ANC-DFW run), but rather than cancel them, I simply never showed up. For the BA flights, I was correctly registered as a no-show (LHR-LAX), but apparently BA reservations thought I had flown several North American sectors. This was easily resolved with the paper ticket, as I obviously still had the coupons.

How would this have worked with an e-ticket? Do they have better record keeping on e-tickets? In future I'll make a point of changing dates on flights I can't make just to be safe.

BTW, BA reissued my DONE4 as a paper ticket with 12 coupons remaining.