Guys, guys, in the old days high jumpers used the old "scissors" and "straddle" styles until Dick Fosbury showed his 'Fosbury Flop' was much better.
Of course, the old ways are still there for people who want to stick with them.
Likewise, Jesus showed people a new better way (the clue is in the name NEW Testament), and people quickly cottoned on..
"The law was given by Moses,but grace and truth came by Jesus Christ" (John 1:17)