We ran into the same gap after MacUpdater started drifting. What worked reasonably well for us was splitting the problem instead of trying to replace it 1:1.

Homebrew (plus brew outdated) covered CLI tools and a subset of apps. For GUI apps, we relied on Sparkle-based self-updaters where available and a small script that checks bundle versions against a curated list for the rest.

It’s more manual than MacUpdater, but the upside is you control what’s checked and when. In practice, most actively maintained apps do self-update now, so the remaining pain tends to be niche or enterprise software rather than mainstream apps.

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