Depends on the size and stage of the startup, so your mileage may vary. I've worked in startups where it isn't economical to have IT support staff when everyone is tech literate and can self serve when things break.

Anecdotally - I worked in a startup with 30 employees, half running Apple hardware and the other half Dell/Lenovo/Build your own. The latter employees always had a worse time dealing with manufacturers warranties and contractors to fix their stuff when it broke.

Worth clarifying with your (future?) employer if you're planning on running hardware distinct from the rest of the company.