If ultimately you still need to plug something in, what makes it less sustainable exactly?

(I don't use a MacBook in 2023)

It’s simplicity I terms of construction and standard. Here, the older standard (3.5mm jack) seems stronger (not an expert but an user opinion) and easier to source than usb c.

If you can't use thing A with thing B unless you also have thing C, to my mind that obviously reduces the expected lifetime of being able to use the combination, especially when thing C is a third party part.