Hi, @LAWRENCEcanDRAW au contraire, painters had often unwanted tool changes, or reverts, as the default setting for that old feature might have been too short. They were maybe switching tool, then started to paint while the shortcut was still held, then the tool reverted to the previous tool they had.
Most painters lenghten the time, or simply disable them.
In fact, that feature makes all tools behave similarly to the spacebar, or CMD: it switches to another tool for as long as you hold the shortcut, then revert.
For instance, you are using the paint Brush, then want to select something quicky, you just hold M, draw the Marquee, then release, you are back to B with only one click.
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