It's still pretty good. TADS is a more modern alternative, and the one I would go with, but basically these haven't been commercially viable products since the 80s so there's not a lot going into it.
Arguably, the right answer now is to document everything that matters to you about the adventure, and tell an LLM to run it.
Yes, very easy to grasp and games will be much lighter than Inform7. Tads it's propietary even if the interpreters are free. Inform6 has the whole stack (even free documentation too), from Inform Beginner's Guide to these, where you have libre games for Inform6 and some free as in freedom
related documentation of Inform6 internals.
It seems to often make it hard to get back where you were, like you go west and then east and end up in a different place. I don't know enough about z-machines to tell why.
Not ZMachine related, not even with Inform6, where n_to, s_to and w_to e_to are pretty much self-explanatory. It's just that Dungeon/Zork/Zork-I-II-III were made that way.
Arguably, the right answer now is to document everything that matters to you about the adventure, and tell an LLM to run it.
https://jxself.org/git/