A typical forum reaction to G8 and V50:
"Didn't change what I wanted so my older model is best. I'm right and LG are incompetent"
The G8 has OLED display, a bigger battery, 2 new ways of logging in, a screen based speaker, and a faster processor than the G7+. It also likely has the Meridian tuning, if that matters.
The V50 has 5G, a bigger battery and a second screen option.
They are significant feature upgrades. If they don't suit you, save your money.
I may get the 3 camera G8 as my G6 has limited battery life in external mode, and OLED is a good additional upgrade. The battery life on the G7 and V40 being similar to the G6 put me off investing.