Boxers who 'switched' their feet with regularity?

[Taeth]

The best place to switch is where you don't get hit in the process of switching. There is no best specific strategy just like in a fight in general anything can be countered, thus switching up what you do and adapting properly to the situation is the key to success

There are strategies. They are not practiced by boxers at the moment.

The strategies are moving from the inside of someones guard to the outside of someones guard maintaining control over their lead arm while you switch stance around them.

this allows you to end up on the outside (bodily) on their lead arm and so you have two arms against their none for that moment and it is them who has to readjust to where you are,so that is also a benefit to you.

Also you are switching feet which takes you away from their rear arm while taking you to the outside of their lead arm.

Of course this can only be done in certain circumstances) as other strategies are done in other circumstances.

But controlling front arm can easily be countered if somebody has done other martial arts and applies them to boxing. If you rely on one thing you will figured out and beaten.