My team upgraded our frontend monorepo from npm+lerna to Yarn 2 with PnP. We saw vastly improved installation time, most importantly on incremental installations. The startup times for jest, webpack, and TypeScript also improved. PnP's dependency strictness eliminated cases where updating a package in one workspace would break a different workspace.
It was a fairly difficult migration, in particular because Yarn 2 PnP does not allow you to import a module that is not specified in package.json. Lots of libraries play fast and loose with dependencies, and so our .yarnrc.yml file which adds those missing dependencies is now 172 lines. PnP requires configuration for vscode and a custom build of TypeScript, which isn't ideal, but those have worked well.
It was a fairly difficult migration, in particular because Yarn 2 PnP does not allow you to import a module that is not specified in package.json. Lots of libraries play fast and loose with dependencies, and so our .yarnrc.yml file which adds those missing dependencies is now 172 lines. PnP requires configuration for vscode and a custom build of TypeScript, which isn't ideal, but those have worked well.