I'd be interested to better understand the timeline around this statement:

"Metaserver was stuck on a deprecated legacy framework that unsurprisingly had poor performance and caused maintenance headaches due to esoteric bugs. For example, the legacy framework only supports HTTP/1.0 while modern libraries have moved to HTTP/1.1 as the minimum version."

Dropbox has been around for a lot of years, and raised a lot of cash; was it only recently that they could pay down this technical debt? Were they really so busy in other areas that this was allowed to fester?