Please, I am a Grooming beginner. Should I watch this tutorial?

https://vimeo.com/241572150 [vimeo.com]

I would like to understand procedural principles. There are quite a lot of Grooming nodes available, and I am not sure, which are obsolete. There is no new Grooming masterclass, unfortunately, and H19 brought this:

"Completely redesigned grooming toolset with many new tools, and interactive brushes."

I have found this comparison, it shows the difference between the old and new Guide Groom SOP:

Houdini Guide Groom Comparison
by Andrew Browne
https://vimeo.com/678329822 [vimeo.com]

Please, are the other nodes and principles (from the 16.5 Masterclass) still valid?

(BTW in the video, Andrew points out, that he misses the "Cut" mode in H19, and adds that in 19.0.541 SideFX have added the Cut mode. It is available in H20, too.)

I went through the masterclasses for H16 and H16.5 and everything (except for the new Guide Groom) seems to be valid in H20.

I also went through the docs of the following nodes and majority of them are "Since 16.0" or "Since 16.5" and all the principles seem to be valid for H20:

Fur
Groom Blend
Groom Fetch
Groom Pack
Groom Switch
Groom Unpack
Guide Advect
Guide Collide With VDB
Guide Deform
Guide Draw
Guide Groom
Guide Group
Guide Grow to Surface
Guide Initialize
Guide Interpolation Mesh
Guide Mask
Guide Partition
Guide Process
Guide Skin Attribute Lookup
Guide Tangent Space
Guide Transfer
Hair Card Generate
Hair Clump
Hair Generate
Hair Growth Field
Reguide
Wire Blend
Wire Transfer