My parents have embraced it naturally somehow, and DM is very active on SM.
PIL have not - similar ages but always scoffed at it as if it was devil’s work. No smartphones. Both were switched on and active in olde age. MIL is on her own now, dependent on DH and BIL for all admin, and simpler things she deals with on her own like finding opening times are harder. But it was 100% choice, not inability, to adopt it, as MIL went to college in her 60s to learn Microsoft Office and has been using Word and Excel for her hobby. But email or internet - dismissed completely.