[lyind]

It seems like there are many usable substances which are hydrophobic (usable as a water repellent). Not so many alternatives which are oleophobic (oil repellent).

I am sure proper research is being conducted to find replacements.

https://iopscience.iop.org/article/10.1088/1742-6596/1904/1/...

[mensetmanusman]

There are oleophobic alternatives, but nothing durable. Durability is proportional to the chemical bond strength.