Glad you asked!
Some developers switched to cloud-based video software around 10 years ago, when computer hard drive space was an issue.
The trade-off for that, as you’ve seen, is if the internet goes down, or if there’s a server problem on the vendor’s side, you can’t use your software.
99% of computers built in the last 5-7 years have more than enough local storage for a video software application, so space is no longer an issue.
And the tech has advanced also, so VSLCreator is a full-featured software in an extremely lightweight package, giving you full control over video production, and NEVER WAIT for video rendering.