At some point, I actually paid for LucidChart for a year.
Last time I used it, before switching to draw.io, it became slow to the point of being unusable once you had a few pages in a document. And I was making an animation where each page showed the next step in a process, so there were a lot of pages.
This was a couple of years ago, so things may have changed since.
My diagrams may have a bunch of elements on them, but I don't think I use any advanced features (irrespective of whether it's Visio, LucidChart or draw.io). From that perspective, these isn't much difference between any of these programs, so there's just no reason to use a paid product.
Lucidchart is tiring complete :) we have a lot of data and automation features, integrations, text based diagramming, advanced shape libraries, dynamic shaped etc. Discoveravility of all the features can be lacking though because there is so much stuff. I've worked on the product for years and I still learn about new features all the time.
Last time I used it, before switching to draw.io, it became slow to the point of being unusable once you had a few pages in a document. And I was making an animation where each page showed the next step in a process, so there were a lot of pages.
This was a couple of years ago, so things may have changed since.
My diagrams may have a bunch of elements on them, but I don't think I use any advanced features (irrespective of whether it's Visio, LucidChart or draw.io). From that perspective, these isn't much difference between any of these programs, so there's just no reason to use a paid product.