ReactOS – booting from BTRFS works! – Info Linux
Not sure. I remember it being barely a thing before Windows XP went EOL. Ext3 was well and truly stable on Linux, ext4 peeking it’s head up…but ext2 was the best the driver would do, stabily.
As to the question of “old”… I suppose using XP at that level of competence before it went EOL would qualify you on at least some scales. But I wouldn’t say the same for any newer release of Windows just yet. Maybe once pre-10 versions are all EOL. (The rapid shuffle through 8 and 8.1 makes those murky to use as a benchmark, and 7 doesn’t feel “old” to me yet.)
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