Individuals involved in developing new Apple Watch models told Gurman that the existing band system takes up a large amount of space that could be better utilized for bigger batteries or other internal components. As such, Apple is apparently considering a magnetic band attachment system, but it is currently unclear if this specific method will be present on the Apple Watch X or if the company will choose something else.
Some variation of this rumor has floated around for years now. Every year we get people saying Apple’s going to change the band design and make old bands incompatible with new watches.
Will it happen at some point? Sure. Do I think it’ll be this next year? No. A magnetic connection seems like the exact kind of thing Apple would want to do if it were practical, but for a device that is used in the range of activities the watch is, it’s not.