I don't like having to pay each year what I was paying for 3 years before it changed to subscription.
See this page for ongoing access to your data if you do not renew the subscription. You can still enter new transactions manually, except for the Starter Edition which becomes read only and is limited. And about 25% of your screen will be taken up with a reminder to renew.
The Quicken Starter version does NOT support any investment type accounts, and if you decide to not renew the yearly subscription - your data file becomes Read-Only, which means you can't use it manually.
In the past, the Starter Edition did not have Tags so you had to upgrade to Deluxe or higher to use Tags. Windows Quicken 2004 and before used Class, Class was renamed to TAG in newer versions (don't know when, after 2007).
If I downsize from Deluxe to Starter version, will I lose anything except the ability to "Track loans, investments, and retirement accounts all in one place", which I don't use anyway?