Not Zac obviously, but I don't think the way Odyssey has been sold or promoted precludes additions and updates.
Where it differs from Horizons, is that Horizons was advertised as a "season" and a firm menu of specific future updates was promised as part of your forty quid. They then struggled to implement everything they'd promised, on-time and in good condition (late, half-baked multicrew, etc.).
Odyssey has more or less been sold and promoted as roughly what we've got (barring bugs and issues). Anything else is extra.
So further, unpaid additions can come to Odyssey, just as the Beyond updates did before to Horizons and Base users, and are likely planned. They're just not being promoted with specific features and specific schedule as part of the Odyssey update; they aren't being sold to us as jam tomorrow, and so they're freer to chop-and-change and respond to what's working and what isn't as development goes on.