[swatcoder]

If you have influence over these kinds of decisions, then I expect have the experience to know that every choice has downsides.

If you haven't found any yet, that should be a Big Red Flag to you. It means you've let yourself get blinded by hype. The good news is that you're part of a team, and your team will probably be able to point some out to you.

Listen to them.

Once you've finally gotten yourself a sense of both the upsides and downsides, and have considered the latter seriously, work with your team to make a decision together. Then try to let yourself buy into whatever decision gets made!

There are definite benefits to TypeScript, but remember that no change comes for free!

[netcraft]

I responded to someone else saying this, but I guess it bears repeating. I'm not saying its a free lunch - it is a build step - there are things to learn - some of the more esoteric types can be very hard to understand. I exaggerated when I said there was no downsides, what I mean to say is that in the cost benefit analysis as I see it so far, the benefits massively outweigh the costs. I've written a fair bit of TS so far and I find it hard to imagine writing a significant side code base without it in JS-land.

I'm not blinded by the hype, im here asking people for what they see as the downsides, the reasons they may have or have heard of why teams didn't pick TS (or better yet did and had some reason it didn't work out).

[brylie]

For what it's worth, your grandparent comment didn't ask any questions, particularly about potential downsides of migrating to TypeScript. Perhaps there is a different comment where you asjed such questions?

In any case, happy coding