I feel like the “don’t replace Data Raven with Gutenberg, or maybe do if you’re Butchershop” and the “Is Ice Wall or Meru Mati better?” discussions each kind of miss the obvious solution.
You can run 3-of DR and Gutenberg, making more than one server a right nuisance of sentries that tag. It also helps alleviate the Switchblade problem if you’ve got an R&D with two or three sentries on it, especially if one of those is a Data Raven, because that’s 6 stealth credits to break (and, with DR, a tag to handle). That either eats into Ghost Runner or uses all your Silencers and Cloaks.
Similarly, any Weyland deck other than Blue Sun probably wants to run 2-3 Meru Mati alongside 3 Ice Walls, because most of their IDs and decks right now are built around rush strategies and cheap ETR is super important (see also why Quicksand looks nice, even if it starts out as a 3/1). Worst comes to worst, going 2 and 2 or 1 and 1 even in BS seems more than reasonable, even if the 2/1 isn’t ideal in the remote, because the 2/4 is an amazing opener. I can’t think of an equivalently taxing hard ETR ice off the top of my head – Eli is more but can be clicked through.
I’ve rarely been sad just tossing another Meru Mati on HQ, either. 4tman is the only expected reason to be wary about stacking them, and against Criminal especially it makes things too taxing for effective Siphoning – not as much as having 3, say, but 6 with corroder and 4 to ditch tags means it’s 3 clicks to deny me 5 credits for little to no monetary gain (1 credit with Desperado and no tags, 5 with Desperado and a Scorch risk).