I've only noticed one impact from Yamaha on Line 6 product development. They discontinued Line 6 products that competed with existing Yamaha products, specifically mixers (Stagescape M20D), PA speakers (Stagesource L2/L3/LS), and guitars (Variax). There's been no Line 6 development of any new products in those domains since Yamaha's purchase of Line 6. Variax JTV, Standard and Shuriken were already in development, profitable, manufactured by Yamaha anyway (except for JTV), and allowed to proceed. Development of Variax ended in 2018 when next-gen Variax was on the drawing board.