Is RPG Maker XP still a viable option?

[Zaphias]

Hello fellow Makers.

So I found an old game of mine I was working on for a few years and thought that it was gone forever.
I was making it in RMXP and had already put some scripts in (Sideview Battles and all that sort of stuff)

Then I was looking around the internet for resources and scripts for XP and saw that almost all of them were gone
or unsupported. Which makes sense going by that there have been 2.5 releases of makers after it.

So I go and try the other makers with trial versions and something just didnt click (make it graphically and ease of access
like the tileset manager in XP is far superior to the VX and MV managers).
Other things were great, like using JavaScript now instead of Ruby (OMFG Ruby x_x)

So my question is

How viable of a maker is XP still at this age? its like what? 15 years old now?
What would be the ups and downs of updating my project to MV?

Thanks!
Happy Gaming!