You appear to have mistaken generation capacity (discussed in the Electrek article) with usage (cited by you).
The point is, there's no sign of the expansion of natural gas usage slowing down. Install base of power plants/generators running off natural gas is growing.
I haven't got all the figures to hand, but consider this report, which covers changes in electricity production in the southern states of the US:
https://www.eia.gov/todayinenergy/detail.php?id=33992
In particular, look at this graph:
https://www.eia.gov/todayinenergy/images/2017.12.05/chart4.p...
Can you at least admit that, in 2017, natural gas capacity grew faster than renewable capacity in southern US states?