I didn't time it, but it didn't take long to download or install , I have fibre optics connection so it was very quick for me. approx about an hour or less, definitely not 2 hours for me. I must admit, I quite like Windows 11 already and sorted so many VR issues I was having before upgrading. My DELL Headset works really well with Half-Life-Alyx now was throwing me out a lot before the upgrade. If you do upgrade, you have 10 days to revert back to W10 if you don't like it.
Pro Programmer / Data Scientist: Languages- SAS (Statistical Analysis Software) , C++ VS2022, SQL, PL-SQL, JS, HTML, Three.js, others
Hardware: PC SPECIALIST intel i7 16GB 2TB HDD & Win 10 (x64), Geforce RTX3060ti. Dell Mixed Reality VR headset, Aerodrums 3D