I'm adding on. I've used a pst file for years, keeping information from multiple email accounts in one central place. I just got a new computer and am find out the "new" Outlook is horrible for multiple reasons, but especially for the pst.
I've tried to set up old Outlook by switching. No surprise, MS didn't transfer my email account settings so I had to set them up a again. Got the pst linked, but now the old version doesn't run.
I wish there was a better alternative, MS is not checking with their customers before making extremely unprofessional changes.