[zzzcpan]

There is nothing stopping you from implementing a feature in a reasonable and ergonomic way without breaking backward compatibility. Programming languages are fun like that. Anything can be done, your imagination is your only limit. And on this level technical debt is not a concern, not even a little. But having good rationale for a feature is, and a huge one. Most of the time the authors themselves don't know why they need it, they just feel like having it.