I spent about 4 months on it daily unable to get up to speed how I was originally.
This may just speak to my own inabilities of muscle memory, and granted, If I used Vim a little younger, I think the outcome would be different.
But the thing is, I'm productive enough.
Furthermore, I found the mouse to be faster in many cases - I only believe the top 10% of vim users who have spent countless hours tailoring their config to be the most "productive" in terms of typing.
I say productive in terms of typing, because when we code, a grand majority of our productivity actually comes from our brain.
Squeezing out additional wpm actually has very little relevance to productivity.
But looking at seasoned Vim users looks cool though, and it definitely does give those style points.