I am still in my trial period and was possibly going to use Squarespace for several sites, but lack of such a basic functionality to make sure your design elements are consistent and you're not wasting your time is worrying. Also, what if you decide to just reorganize your site so that some elements from one page should now be on another, it's frustrating to have to create them again "from scratch" as opposed to just selecting and moving them.
This would massively speed up page development - being able to not just duplicate a Section - because how often do you want the two sections the same on the same page - but to save Sections (effectively your own Section Templates) to be used on other pages.
It would also be of huge value to clients, for whom we could build out a library of Section Templates for them in addition to Page Templates.
Just stunning that this extremely basic functionality isn't already part of Squarespace, seeing as it's been requested - vehemently - since 2017 at least. I found all these delightful threads full of people who would love to be able to do something like, say, use the same form they created on one page on another, or copy/paste a section of laboriously arranged blocks so that they needn't recreate hours of work over and over. Each of these threads ends with "perhaps you should request this feature!"
So, exactly what does it take to get Squarespace to even notice repeated, consistent requests for a feature from multiple users over the course of multiple years? Are we expected to convey our requests via a note tied to a brick thrown through the home office window? I'm willing to do that if it'll spark a little activity on the backend. Perhaps the feature we need to request is a REQUEST FEATURE feature, since the one we currently are being repeatedly told to use is completely nonfunctional.
Squarespace charges a truly shocking amount for a desperately mediocre service; the least y'all could do is actually pay attention to your customers.