Call display. You can preview who’s calling before you pick up. We seldom pick up here; about 90% of calls are distracting callers with agendas and not worth the time of day. If ever it is someone who is legit, they will leave a message on the machine.
I generally leave my cellphone off and only use it for preplanned contacts. All this has worked wonderfully well for decades and eliminated a lot of crap from my daily life, while retaining the handiness of landlines and cellphones.