I just picked up Plasticity earlier this week to start trying to learn it, it's been on my radar for a while. I've been using TinkerCAD for years for making my simple models, and it works really well for the basics but there are things that become painful there that Plasticity has promise of making a lot easier.
One of the first tutorials I went through was really frustrating though. Some of it may be that Plasticity is a quickly moving target right now (lots of tutorials are for v0.x or 1.4, with current being v24, for an idea).
A lot of the pain was this tutorial just didn't touch on the basics it was assuming you knew. Some of it was just getting used to the tool and figuring out what mode you are in and which you need to be in to accomplish what you need to do. I struggled a lot with just getting keyboard shortcuts and the trackpad navigation to work. I never did find a description of mouse/trackpad mappings (possibly made worse by there being ~5 themes you can select from).
It shows a lot of promise, but there's going to be a bit of a learning curve. But there was a learning curve on TinkerCAD too, I just need to keep that in mind.
Pricing is ok: free 30 day trial, $150 for a license with 1 year of updates, and $299 for the Studio license. I don't use CAD that much, like maybe a model a month or less, so it's kind of a big bite to take for me personally, especially with it being young and likely to need to spend $150/year for a while here as it's revving up. The Studio version's xNURBS feature seems like it might be really enticing, but just makes that even harder for me to bite off.
I probably should try OnShape just because they do have that free plan.
I'm also looking at OpenSCAD for doing parameterized models. I installed it last night and asked Perplexity AI to generate a model, and it made a good start at it, but couldn't quite get the tongue-and-groove right.