I have applied for the card last month and might use some Estonian e-services in the future. SignWise[0] will save some time when signing contracts with persons from countries with supported e-IDs.
Forming a company in Estonia remotely is indeed very easy, however there appears to be little benefit compared to e.g. the UK, which makes online limited company formation just as easy (you do not even need a digital ID card) and has a well-known legal system. Since I am a resident of Germany, my Estonian company would be taxed here and could not enjoy the unique Estonian corporate income tax regime anyway.
[0] https://www.signwise.me