At https://github.com/boostorg/wiki/wiki/Getting-Started%3A-Overview#installing-boost it says:
The initial cloning will take at least 45 minutes on a 3.0 mbps Internet connection and will consume roughly 1.5 GB of disk space.
3mbps is pretty slow in 2026, but more importantly, the repo now takes 2.2GB
Maybe say something like "will take several minutes even on a fast internet connection, and as of 2026 consumes more than 2 GB of disk space."