I agree 100% with the well positioned comments of SMRoberts - Thank you.
Go forward changes can be made. BUT why render as useless, an existing library of Assets - aka: image files such as EPS. Note the use of the word "asset" - that's exactly what these image files are to our stock-in-trade - items of value, we rely on and use these.
We are well invested in Apple Tech - but now we have some technology just purchased - that now sits, unused, only because eps is removed from the workflow.
Yes, by not switching "up" to the new OS we are getting caught in a circular problem of Browser, PS, ID, AI, and other utilities NOT able to upgrade and therefore running into a range of incompatibilities - that pinch other operators in the Creative & Production environment.
Note to Apple: If eps files are capable of having "bad stuff" – let us, the user, be free to manage our risk.
Go ahead shut down from today forward as a format to "save". BUT please give back the ability to "see" and open these 'saved' assets from our asset library.