Limited Liability Companies $($LLCS$)$ are gaining in popularity over sub$-$chapter S corporations because

LLCs offer better liability protection to their members.

sub$-$chapter S corporations are being phased out by the government which is promoting LLCs as they require less paperwork on the part of the IRS.

they are simpler when it comes to paperwork, offer some of the same tax advantages, and also protect members from unlimited financial exposure.

sub$-$chapter S corporations are being taxed at a higher rate by the IRS.