In future there maybe no sMerits?

You don't need to worry about running out of sMerit. It won't run out, spin and keep spinning.

You can take a little time to read, for you not to worry about sMerit.
The same thing has been discussed here.

[1]. Topic: Is the Merit System Generating Enough Merits?

[2].Topic: sMerit Post-Review

Quote