I product I developed in the early 2000's used that technique for a dynamic tree control. That product wasn't retired until 3-4 years ago. It still worked as

I product I developed in the early 2000's used that technique for a dynamic tree control. That product wasn't retired until 3-4 years ago. It still worked as intended in modern browsers but you could, in theory, fire up Netscape 4.0 in 2019 and that dynamic tree would still work.