jQuery is 84 KB minimized, while Vue is 85 KB. Not much of a difference (although, granted, Umbrella JS is notably smaller). You don't necessarily need Webpack for Vue, you can just include Vue in a script tag and write your code.
You wouldn’t use jQuery/Umbrella for that either, but there might then exist a middleground where you would. e.g. any time you’re adding JS to an existing page but don’t want a whole component abstraction.