jedibuttercup

The better question about DVDs/Blu-Rays may be whether they actually release the episodes that way; not everything one would like is showing up on disc these days. (Note the singular lack of season or series sets for either Galavant or Agent Carter, both of which I would have bought like a shot.) Paramount/CBS has historically been pretty stingy about discounting the Trek discs (except for the animated series), but that's eased up just a little recently, but at least they've steadily released discs -- whereas Disney/Marvel notoriously doesn't discount much at all and has a good deal of material that it keeps out of disc circulation.

OTOH, I have seen/heard various folk talk about waiting till the full season has been released, signing up for CBS All Access for a month or two to binge-watch, and then cancelling again -- the subscription model being purely month-to-month, there's no financial penalty at this point for doing this, and the net cost to do so is relatively low.