Thank you for your reply - it was informative.
My understanding (provided by a LG region manager only verbally) is that the new 2019 LG OLEDs will support the additional apps we are missing including the updated Hulu live streaming, and that there are no hardware limitations in the 2017 and 2018 LG OLEDs to prevent the new webOS-based apps from working. The limitation is LG's alone and could be easily "unlocked" and installed with the next update. Assuming that is true, I can't point to the app providers. Its up to LG to open the "sandbox" - sorry if I am using this term incorrectly.