https://www.jakeinmotion.com/railcut

Railcut brings track-based clip editing to After Effects. Trim, ripple, cut, and move clips without roundtripping to Premiere ever again.

• Everyone said don't editin After Effects.They weren't wrong.For years, everyone said the same thing: "After Effects is not an editor. Go edit in Premiere." And historically, that was true. AE previews were slow. Realtime playback was never possible. Changing anything meant re-rendering. The editing roundtrip to and from Premiere was just part of the job.
• But things have changed. Between After Effects' performance improvements and modern hardware, realtime playback is genuinely achievable. After Effects can be your editor.
• It just never had the right tools, so I built them.