I received my Xiaomi Mijia Sign Pen yesterday - price was $1.99 including post. To my surprise there were 2 physical unfranked $1 stamps on the envelope. Without thinking about it I did the old fashioned kettle steam to remove them. The wife saw me and laughed as she had not seen this before (my Mum always did it).
Is steaming unfranked stamps off envelopes still a thing - or incredibly old fashioned.
Using stamps in general is quite old fashioned as generally franked mail labels are printed nowadays so can imagine steaming is mostly collectors and frugal people.