My system is as follows :
ACER TC-895, Windows 10 home 64 bit, i7 10th generation processor Intel UHD 630 graphics, 8GB DDR memory, 256GB SSD, 1TB HDD, WD MyCloud network drive.
I think that should handle things. The task manager never shows that the PC is under any particular stress. I have noticed on some occasions that VP produces absolutely massive audio files and goes on all night without finishing. Seems to get itself into a loop.
I try to provide VP with files that it 'likes' to keep processing efficient, but sometimes it falls over. Other times it's great and renders just as you found.
What kind of gear are you using to achieve the results you mention above?
Any other suggestions?