Not to excuse outlook for its failures, but G-suite email searching also breaks once you hit a certain inbox size. As for shared document editing, most places

Not to excuse outlook for its failures, but G-suite email searching also breaks once you hit a certain inbox size. As for shared document editing, most places develop intra-office file system-level habits that avoid the problem, or use specific hosting sites to co-ordinate multiple teams on a platform agnostic basis. On a per-document basis, Word's review, commenting and blacklining features are worlds better than the G-suite equivalents.