Outlook classic is on life support. Next October Exchange Online drops support for it.
It’s built on decades of code. It allows plugins to directly affect the UX. It still uses I explore at times.
I switched to new outlook and while it has its own significant issues, at least it’s not spaghetti code. It also runs on top of Edge, which allows Outlook devs to ignore a lot of backend code, and makes the UX pretty consistent across platforms.








Yeah those com addins are usually the problem with outlook stability. Simply moving to modern addins improves Outlook classic significantly.