That is also not accurate.
They publicly announced:
- working on bringing FileMaker solutions to Android and collaborating with Livecode to achieve this
- working on making both FMP & FMS available on M1
- working on removing Internet Explorer 11 and replacing it with Edge on MS Windows
- working on improvements to the quickstart experience
- working on bringing FMS to Ubuntu
Anything that is announced is never done so in the form of a promise. As far as I am concerned, they could pull out of Android as long as they have not introduced it. Now, does that mean we are not going to get M1? Does that mean we will be stuck with IE? I don't think so, it just means we don't have a date, and we have to wait. Even if we had the date, we would still have to wait. Even if they gave a date, they could manage to ship on a different date, earlier or later.
So taking the liberty of rephrasing your statement, yes, Claris discloses what they are working on, and yes they do so publicly. Does that give you access to the whole roadmap, with a backlog and priorities and dates for each? No. I am not an ETS member, but if you feel like you are not getting enough, I can only suggest that you enlist to it by emailing ets@claris.com (my understanding is that access to ETS does not require Claris Partner membership or any such thing), just keep in mind that ETS is not meant as an early notification system, it is meant for testing and providing feedback to the manufacturer. If what you are looking for is "What will be in the next release" instead of "What is Claris working on", then I think contributing to the ETS is your best chance at putting some of those puzzle pieces together to get a picture that could look like a next release.
Let's not pretend we are still in 2015 when FileMaker Inc. was not as open as it is today about its roadmap and its other initiatives. If speculations are not useful, I can just as equally say that the statements that I quoted for their inaccuracy are harmful.