Pretty much what it says on the tin! I've been considering making a serialised interactive project - and it made me realise how many game-making tools take for granted that you'll be making a single, more-or-less self-contained work. Which is kind of odd, now I think about it!
Web-based stuff allows for repeated updates really well, obviously. Also I know that a lot of long-form interactive fiction gets released in instalments - mostly using Twine with an import/export save function, I gather? Are there any others? How would video game culture change if there was more of a focus on publishing games in small chunks?
Do interactive narratives just... not really lend themselves to serialisation? I'm reluctant to believe that! Importing player choices comes with a lot of complications and potential scope-creep, for sure, but there's so many games with relatively linear storylines. Plus, accounting for player choices isn't impossible - you just need to be clever about how you handle it! BioWare games have done this both extremely well and extremely badly at various points.
(There's also space for a wider discussion here about other assumptions made by digital tools, although possibly that deserves its own thread? I would dearly love to find a code editor with the same kind of drafting/editing capabilities as writing tools like Scrivener, for instance.)