There's a really nice lightweight vector design app for Mac and iOS called Graphic [0]. It was one of the first fully-featured design tools for iOS, and still the best to use.
It was bought by Autodesk back in 2015, who promptly did nothing with it at all. Pretty much all development ground to a halt. From being updated every few months, the Mac app has only been updated three times in the last five years.
It's since been spun-out to a different company, but development still isn't really happening – the iOS app hasn't seen an update since 2018.
The lack of attention this app has been shown is sad, as it's a good piece of software and I use it all the time. It had the potential to be the vector equivalent of software like Pixelmator or Acorn – lightweight but powerful alternatives to Adobe products created by independent, highly-passionate developers.
Instead, newer apps like Affinity Designer and Vectornator have taken any traction it might have had - and it's probably going to stop working with an upcoming release of macOS if they don't do anything.