If you machine plane your lumber to thickness, usually leaving only the barest smidgen to clean up with a hand plane (leaving a lot contradicts the installation of machines in the first place) then replacements are a waste of money. If you hand dress your lumber from the rough, replacements could make sense but keep reading.
I've found that edges in the Stanleys and Records I've owned last about as long as I can to the next quick break -- thirty to forty minutes or so. One has to stop and check for wind, flatness, and general planing progress doesn't one? Planing for an hour ++ without a rest and a check of progress and reflection is a recipe for disaster. Maybe have a smoke and do a quick honing and back to work, any honing media will do by the way. I wouldn't let the thought of edges that 'never' go dull become an obsession (intentional hyperbole). If anything, they interrupt a normal shop rhythm rather than add value to it. You tire out before the edge does, take your break and check things, have a wee-wee, get back to work with plenty of energy and halfway into the next cycle the edge finally goes. You're good, the edge isn't. You try to get into sync with the thing but it will always last longer than you can to the next little rest, if honed on break. About the only way to get into some sort of sync is to hone it way before it really needs it, at your break, which of course defeats the entire purpose of buying it in the first place. No thanks. It doesn't get any sharper than any other decent tool steel, maybe not as sharp, why bother?
The takeaway: buy edge tools that go off predictably and last about as long as you can if working reasonably vigorously making solid, workmanlike progress. As long as said tools take a good edge, and Stanley and Record do, all will be well.
If you follow forums long enough you'll find certain folks who gush as reliably as the Old Faithful Geyser in Yellowstone Park over new tools and stuff. First it was A2, then Cryo A2, Ron Hock's carbon steel, now PM V11, I'm likely missing a couple, and I'm sure the list will continue to grow. Add 'em all up, these steels probably haven't planed .001% of the wood that has been planed with Stanley irons over the last hundred years or so.