We have Lightning Network, MAP Protocol (MAP), Liquid Network, Rootstock and Stacks in addition to sidechains so the features provided by these networks are what will determine the number of users but the majority will prefer Lightning Network for low cost daily transactions. It is not a hard fork so it does not need network consensus.
Many discussions about them are there
Sidechain Observer - Bitcoin L2 Projects & current state of development
Generally when transaction speed is main concern, and priority is the speed, a blockchain must sacrifice other things including security. It's my understanding and if I move big fund, I don't pick these side chains that I only consider to use with small transactions.