TCP-in-UDP keeps TCP's battle-tested logic but wraps it to bypass middleboxes—great for legacy systems. QUIC is a clean-slate rewrite, better for new apps. Tradeoff: compatibility vs modern features.
By wrapping TCP in UDP, you essentially lose all benefits of compatibility, though. If neither middleboxes nor your OS are involved, there's not much left to be compatible with.
lxgr|7 months ago