Sure, there will be hardware degradation and obsolescence, as with any other device. Perhaps even option to hot-swap some of the hardware components, idk. Software development, updating going alongside and the marketing forces spinning whirlwinds around all that. Imagine, a window pops up in the top left corner of your... (field of view?), despite the adblocker, a sexy voice pitches you the all new underwear merch. Later that day, before going to sleep a deeply concerned voice emerges from the depths: please update your brainware to v1.0.666, two options pop up: “Yes”, “Remind me in 15 minutes”.
This creates an amazing set of market incentives.
People who upgrade will have an advantage. People who delay an upgrade will have a future advantage. And then the original people will create market demand for the ability to upgrade/replace what they already have. So, removable hardware will be a long-run goal. Being able to add (painlessly) to existing infrastructure will be a goal.
Gamers are used to this dilemma: do we buy the +1 sword now, making future grinding easier. Or do we grind longer, so that we can get the +3 sword. ... I don't have an analogy for swapping out the +1 sword for a +3 sword, lol. I betcha, with brain wiring, this won't be pleasant.