My experience is exactly the same, I had a lot of different sleeping schedules over the years (usually late to very late). Currently waking up at 6AM is also the new normal for me.
It just can be really hard to change it if you are not forced to do so but after some weeks you adjust. It's especially difficult to switch from late to early in my experience because constantly staying awake longer is easy (especially with all the "modern distractions") but getting out of bed too early is really a pain so you often don't do it if not forced to.
It just can be really hard to change it if you are not forced to do so but after some weeks you adjust. It's especially difficult to switch from late to early in my experience because constantly staying awake longer is easy (especially with all the "modern distractions") but getting out of bed too early is really a pain so you often don't do it if not forced to.