The K400 keyboard+trackpad I have routinely lasts at least couple of years despite only rated for 18 months, but it didn't get as much usage as a regular kb+m as it was mostly used as a couch keyboard or as a quick debugging combo for working on machines on a workbench.
https://www.logitech.com/en-us/products/mice/m705-wireless-m...
This M550 mouse is rated for two years using the Bolt wireless adapter.
https://www.logitech.com/en-us/products/mice/m550-signature-...
The K400 keyboard+trackpad I have routinely lasts at least couple of years despite only rated for 18 months, but it didn't get as much usage as a regular kb+m as it was mostly used as a couch keyboard or as a quick debugging combo for working on machines on a workbench.
https://www.logitech.com/en-us/products/keyboards/k400-plus-...