It's curious that despite this cultural revolution that led to founding of planet Vulcan they are still basically equals technologically. It doesn't appear that a few thousand years of excess emotion and violent tendencies has been at all detrimental to Romulan technological advances.
Their physiology is barely diverged so their intellects are likely to remain similar. Espionage is frequently the theme of Romulan encounters, which would help keep them up to date. And if they procreate more frequently than every seven years, they might have a much larger population even with greater murderousness, with more people being advantageous for tech development.
It's curious that despite this cultural revolution that led to founding of planet Vulcan they are still basically equals technologically. It doesn't appear that a few thousand years of excess emotion and violent tendencies has been at all detrimental to Romulan technological advances.
Their physiology is barely diverged so their intellects are likely to remain similar. Espionage is frequently the theme of Romulan encounters, which would help keep them up to date. And if they procreate more frequently than every seven years, they might have a much larger population even with greater murderousness, with more people being advantageous for tech development.
They also have an empire with a large number of client species. Vulcan does not. If anything the romulans are more advanced than the Vulcans