This is simply my highly subjective opinion, so take it for that, but it was really a number of factors.
Template format.
I actually really like Mithril's view format: it's an API built exactly as it should be -- to make using it very intuitive and natural. I also think it's a great solution technically, since it fluently combines a shorthand for generating HTML with data binding and lets you use native javascript (making it easy to build parts with functions or loops or whatever).
What I didn't like was actually working with it, as a lazy and mainly non-web developer. I like to copy and paste chunks of markup from bootstrap's documentation or other places. Recreating is fine for small things, but then I started porting pieces of another internal app that involved at least a couple hundred lines of HTML. There is(/was) a tool to convert, but it didn't work well enough to be usable for me.
I also realize there's MSX now, but I don't remember it at the time: I'm not sure if the documentation was lacking, or I was just tryin to avoid the complexity of a build tool for this (or both).
For my purposes, the only really fundamental difference between the two was the template format, and being able to stick HTML into Vue, add a couple attributes and have it work just worked better for me.
Community/Growth Potential
I felt the Vue community was bigger and growing more. The Mithril documentation was and continues to be great, but at least at the time there didn't seem to be much writing about it beyond the Mithril site.
Contrast to Vue, where it was easy to find many blog posts, StackOverflow questions/answers, etc.
I've used my share of frameworks/libraries that were later abandoned, and I really try to avoid that.
Template format.
I actually really like Mithril's view format: it's an API built exactly as it should be -- to make using it very intuitive and natural. I also think it's a great solution technically, since it fluently combines a shorthand for generating HTML with data binding and lets you use native javascript (making it easy to build parts with functions or loops or whatever).
What I didn't like was actually working with it, as a lazy and mainly non-web developer. I like to copy and paste chunks of markup from bootstrap's documentation or other places. Recreating is fine for small things, but then I started porting pieces of another internal app that involved at least a couple hundred lines of HTML. There is(/was) a tool to convert, but it didn't work well enough to be usable for me.
I also realize there's MSX now, but I don't remember it at the time: I'm not sure if the documentation was lacking, or I was just tryin to avoid the complexity of a build tool for this (or both).
For my purposes, the only really fundamental difference between the two was the template format, and being able to stick HTML into Vue, add a couple attributes and have it work just worked better for me.
Community/Growth Potential
I felt the Vue community was bigger and growing more. The Mithril documentation was and continues to be great, but at least at the time there didn't seem to be much writing about it beyond the Mithril site.
Contrast to Vue, where it was easy to find many blog posts, StackOverflow questions/answers, etc.
I've used my share of frameworks/libraries that were later abandoned, and I really try to avoid that.