Hello… yes… quite a widespread net you’ve cast there… good luck with that one 
That will take a lot of effort from a lot of people.
So, just a quickie instead 
Im not a power user etc, but Ive been with PG since V1.2 something… IM just a tinkerer really.
I was user number 11… on the slack group, when we had one.
Thats been and gone. information dissapears after message number 10,000 on that unless you pay some dumb amount of money per user … so now we have this forum.
if you check this forum and recent updates, you’ll see that the recent update alone address’s umpteen user requests.
I think Ive been on this forum something like 6 years, but a tad quiet as of late as PG is moving more in to the more capable hands of pretty experienced web devs, so… er… I ain’t answering them types of questions!
Only this week… I received a chatty email from @Matjas himself after a quick message I sent off about Licencing.
So, its active, the main dev is fun and living the dream while still doing this, you can look him up, good wholesome stuff, charity work etc.
Some Devs have come and gone to the team over the years, but the Apps dev has always been pretty consistant.
There have been consistently repeated feature requests, which you wont find implemented (ie, ftp etc , due to design constraints and non repetition of freely accessible free tools) etc, there have been flamers (VERY FEW on this forum… seriously -usually users who take umbrage at the devs *refusal to implement THEIR VERY PRECISE vision of where THEY think the app shoudl be going…er, ok then, not their App… or raging about belated updates to freely available code libraries. (ie, Bootstrap etc)… -which can also be manually updated ) and some raving fan boys (waves hands in air like I dont care)…
And through all those years, Matjaz has listened and they have made their design decisions accordingly and asked users for feedback and wherever possible implemented things.
Even the things I have no idea about as they are beyond me. But he gets smiley faces for it on here, so yeah, that works.
you wont find a road map, dont bother asking.
the Documentation, may drive you to distraction due to varying versions and there not being a linear manual so to speak…
but lots of Tutorials etc, just maybe not where/how you’d like the order or lack thereof.
but then you have this forum too.
I recommend using the search function top right, Loupe or magnifying glass.
so, welcome aboard and carry on.
Im just another user by the way, and have been lurking for some time!
And maybe check out @fakesamgregory 's posts on here and his youtube stuff.
He’s a Webflow to Pinegrow kind of guy.
I wonder if there will be another similarly named, rhyming WebDev App coming along soon.
HI! and welcome to MonkeyBlow!
The latest and greatest web dev app from…zzzzz
Anyway, just check the forum… so these are a couple of VERY RECENT user posts…
…after YEARS of App dev… still at it, still delivering.
and
And just follow the flow in this post, between a first time poster to the forum and the Lead Dev…
and thats after umpteen years of consistent development.
Still listening to the Masses.
there, you get the idea.
ok, carry on