I don't see time being a real issue. If straight shaving is something you enjoy doing just get up 5 or 10 minutes earlier.

Of course one could (I guess) spend an hour really taking your time but I don't see why one would take more than 15 minutes normally even taking your time (which I would suggest).

I must not be the usual case because I also enjoy DE shaving. I definitely didn't enjoy shaving before I started wet shaving however.