4 year old Lenovo laptop here, 16GB RAM and SSD. Bootup from cold is around 5-seconds, everything is pretty snappy even with lots of browser tabs open and VSCode running. Never had the start menu lag other people have reported. Definitely faster than it was when Windows 10 was installed.

Have you checked for viruses? Last time I saw a machine that slow booting up, even with a spinning disk, it was riddled with viruses.