Honestly love this. The version-control hell of "deck_final_v3_REALLYfinal.pdf" dies the moment everything lives at one URL - single source of truth, always current, way faster to iterate.
And this is where it gets genuinely better than docs, not just equivalent: you can drop smart search right in. Full-text or even semantic/ask-a-question search across everything you've ever sent the client. A PDF graveyard is unsearchable; a living site where they can type "what did we agree on pricing" and land on the exact line - that's a real upgrade. Honestly one of the strongest reasons to go this route.
Stuff I'd still think through before going all-in:
• Portability - some people want to download, print, or forward. Worth a clean "print to PDF" path so you're not fighting that instinct.
• Stakeholders who expect a "document" - legal, procurement, execs forwarding upward. A link can read as less formal/archivable to them.
• Hosting + link rot - where it lives, who can access it, what happens in 18 months if the link dies.
• Sign-off + archiving - anything needing approval or a frozen "agreed on this date" record should be snapshotted, not left as a living page.
• Search caveat - it shines once there's real volume, and bad search is worse than none. If it's AI-powered, scope it tightly to your content so it doesn't start guessing.
Net: HTML by default, smart search as the killer feature, export when the situation demands it. How's the client reacting so far?