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Waist of a good back ruining it by needlessly lugging a 110v step down tranny about to drill a few holes to put up shelves.
It's not even a legal requirement; on all sites you CAN use a tested RCD with a 240v supply. Most big sites will switch off the 240v supply until handover though as it's too much of a headache to check that the usual crowd of muck savages aren't getting "creative" to bypass an RCD that keeps tripping.
My old man used to insist in 110v tools for home use.
Zero practical benefit, and a very attractive target for tea leaves.
Which is why he was regularly cleared out of all of them...