It’s slow and inaccurate and it displays less information making you click on results for more information.
Spotlight is and was my most used tool in Mac OS. I find it has taken a step back. The same searches I did with Catalina are not showing in Spotlight.
Things like currency conversions require you to click on a the result to show more information. Same with Metric conversions.
I am giving Alfred a try. Never used it. I hope its fast and accurate as Spotlight was before Big Sur.