Yes, it's standard now.
PLEK is viewed with mixed opinions in the luthiery community.
Yes, it can make for a nicely playable neck. Yes, it makes for repeatable results. Yes, it can save some man hours, and therefore some cost.
However, it takes quite a bit to setup and maintain a PLEK machine to perform optimally.
If it's not, you can have a large run of less than optimal results.
Also, fretwire is actually a fairly complex and well engineered thing.
There's a lot that goes into string-side shape and profile, and the outer layer is hardened for wear resistance.
Plek changes this shape, and takes off the hardening.
Time might be better spent, with better results, looking to tighter quality control of milling and finishing neck and fingerboard blanks. Small variations in these can result in big variations in playability due to these variations manifesting themselves as the frets not laying well on an uneven playing field. It might be best to have a perfect neck and fingerboard to lay the already well made frets into.
Just some stuff to think about. There are several other layers of things to think about in the process of getting all that just right;
PLEK isn't necessarily A New Miracle that makes everything better. Great Luthiers have been doing great fret dressing by hand for years and years.