The phrase "vast insights" is correct and usable in written English.
It can be used when referring to a large amount of knowledge or understanding gained from experience or study.
Example: "The research provided vast insights into the effects of climate change on marine life."
Alternatives: "profound insights" or "extensive insights."
But the incident gave vast insight into the management style of Mayor Michael R. Bloomberg.
The NYSE will sometimes support additional regulations even if the evidence behind them isn't quite decisive that's because the exchange has vast insight into large and small investor psychology so its executives can make educated guesses about what will support or undermine investor confidence.
Instead, The Sopranos should be praised for the vast insight it offers into Italian-American life.
Over the last decade, vast insight into the plant growth and development and other plant processes have been gained because of the growth and development in molecular biology techniques.
While these studies have provided vast insight into the epigenetic mechanisms that can silence E-cadherin and their functional consequences, they also indicated that E-cadherin inactivation through transcriptional repressors is not the main driver of ILC development.
It doesn't require vast culinary insight to see the connection between these two halves of the menu: the production of individual items, the pastry work, both steamed and baked, the emphasis on the visual.
Beyond succession issues, the 22-page letter delved into the performance of Berkshire's vast holdings, providing insights into the country's business prospects.
McCoy is confidently predicted by many to be a pundit in waiting when Channel 4's coverage of jumping resumes in the autumn and there is little doubt that he could offer a vast store of insights.
He has a vast store of insights about jump racing to offer, though of course he will have to get over the initial reticence of every ex-jockey about pointing out when one of their former colleagues has failed in some way.
