I wonder, when somebody will make STOL plane with good per mile economy. - Now exists excellent Piper and Maule, but they have comparable small range (for mode

I wonder, when somebody will make STOL plane with good per mile economy. - Now exists excellent Piper and Maule, but they have comparable small range (for modern 1-motor typical more than 1000kilometers range), because high drag coefficient (non-retractable gear, textile skin). I think, it is possible to make small STOL with big range, or for example, electric STOL.