When Claude 3.5 came out with a long context length, you could start pasting a few files in, or have it break the project into a few files, and it would still produce consistent edits across them. Then I put some coins in the API sides of the chat models and started using Zed. Zed lets you select part of a file and specify a prompt, then it diffs the result over the selection and prompts to confirm the replace. This makes it much easier to validate the changes. There's also a chat panel where you can use /commands to specify which files should be included in the chat context. Some of my co-workers have been pushing Cursor as being even more productive. I like open source and so haven't used Cursor yet, but their descriptions of language-aware context are compelling.
The catch is that, whatever you use, it's going to get much better, for free. We haven't seen that since the 90's, so it's easy to brush it off, but models are getting better and there isn't a fkattening trend yet.
So I stand behind my original statement: this time is different. Do yourself a favor and get your hands dirty.