…for situations where people are providing service above and beyond what you’re already paying for through other means.

For me, this requires physical interaction between me and the person. If I can hand them a tip, it will be 10-15%, just like in the 90s.

If I’m in Starbucks and when I order something a prompt comes up on the machine asking how much I’d like to tip, it will always be 0 unless I’m asking staff to come deliver my order to me outside instead of picking it up myself. They should already be being paid a fair wage for the work they do behind the counter, and if I find out they aren’t, I’ll take my business elsewhere.