New Trial org expires with 30 days the developers finds it very difficult to use the Trial Org, at least for developers create some orgs with large expire date (even less functional) will help the developers.
It will help to attract more Developers towards Dynamics :- and connection to it with Microsoft learn will boost many things to developers.
Salesforce offers developers accounts with less functionality, and connection to Trailblazers (Learning path) making it easier for developers.