Is there a free way to make a multiplayer game now that the network function is going to become obsolete.
yes if you are using unity 5.6, 2017 or earlier versions of 2018, you can use unet (unity multiplayer). But if you are planing to shift to 2019 then you will not be able to use the current multiplayer functions provided by unet.
No. The last and the only server/client code was written back in '96. It’s still on the roll