Here's a chat I just had with Time, a top 100 NA Protoss player; I've bolded parts where I felt he shared my stance on this topic:
You: hey patrick, can i ask a quick question?
Time: ya
Time: what's up?
You: cool; there's a little debate I've been having with someone regarding 4-gate
You: im just wondering from someone that's actually good on how "all-in" it is
You: and its potency to transition out of to expanding
Time: well
Time:
usually it's pretty all-in and hard to transition out ofTime: it might be possible to like
Time: throw down a nexus and still go 4 gate
Time: but usually that just ends up making your attack too weak and your econ isn't strong either
You: right...so if a 4-gate push fails
You: transitioning is possible but your behind in economy right?
Time: ya
Time: I mean
Time: you can do a lot of economic damage
Time: and then expand
Time: and be even or ahead
Time:
but if you don't do any damage to their econ you're gonna be behindYou: i see...
You: cause one guy says
You: he can keep up probe production
You: and produce units out of 4 gates which i dont believe to be true
Time: I mean
You: off 1 base
Time: I'm pretty sure some math geeks have done the calculation on tl and
you can't support 4 gates with constant production unless it's 3 zealot/1 sentry every round and even then you're like totally brokeYou: i see...
Time: which matchup are you talking about?
You: just in general
Time: like
Time:
4 gate PvT is totally all-inTime:
you can't reasonably expect to transition out of itYou: why is it different in PvT?
Time: well against zerg I feel like it's easier to do damage
Time: because if you force them to cut drones for a long time while they produce units to fend it off
Time: then you can have a stronger econ than them
Time: but against terran they can still make scvs while making other stuff
You: interesting
Time: also, if they were going for fast banshees
You: so in PvT, you'd consider it all-in, but in PvZ/PvP you wouldnt?
Time: and you don't kil them
Time: you can't have detection
Time: I don't understand PvP
You: hehe
Time: I have like
Time: 3 different all-in builds
Time: and sometimes I expand if I feel like it's a good idea
Time: but mostly it's just 1 base every game
You: interesting...
Time: if you want to go 4 gate
Time: and expand
Time: you can go like
Time: 1 gate
Time: nexus around 28 or something
Time: then add 3 more gateways
Time: it's pretty good in PvT and PvZ
You: yeah, i've been using this build that i saw HuK use a lot where i 1 gate FE to 5 gate
Time: and some people have claimed to get it to work in PvP
Time: ya he did it like every game at MLG
You: haha, yeah exactly
You: alright, well thanks for the tips
You: and nice carrier icon

Time: np
Time: thx