TE this side. I have complex snippets that something like Typinator could probably handle - but there are 2 key features that keeps me with TE:
1.) Its suggestions by notification of words I should consider changing into a snippet; and
2.) Its watching what I type, and reminding me by notification to use a snippet I already have set up, but didn’t trigger.
Yes, the notifications can be annoying, but have found they have helped me to use TE, and my snippets, more effectively/regularly.
Not sure if other text expansion products offer the above, but that’s my reason for staying.