> On opening 2-XL by removing 13 screws I was ready for an internal mess and had the air duster ready. But the insides were pretty clean for something 44 years old.
If you don't have re-circulation / ventilation fans, it really shouldn't get that messy if the exterior case is moderately tight. My image of "old electronics" is mainly from old mainframes / desktops, and those have copious fans to really suck in all the dust and pet hair.
It generally heavily depends on room it is in. My PC at home (no AC, middle of city) pretty much needs yearly dusting, one in office (AC) barely gets any dust, servers in datacenter even less even after near decade of use (we had some legacy stuff)
If you don't have re-circulation / ventilation fans, it really shouldn't get that messy if the exterior case is moderately tight. My image of "old electronics" is mainly from old mainframes / desktops, and those have copious fans to really suck in all the dust and pet hair.