Superinstructions offer a small speedup, but their existence complicates things; mainly instrumentation, and specialization.
The tier2 optimizer is likely to be simpler without superinstructions.

This experiment shows that combining the most common superinstructions into single instructions can outperform superinstructions, rendering superinstructions pointless.

We have already removed almost all superinstructions in specialization. We should remove them altogether.

Linked PRs

• GH-105229: Replace some superinstructions with single instruction equivalent. #105230
• GH-105229: Remove remaining two-codeunit superinstructions #105326
• gh-105229: Remove syntactic support for super-instructions #105703