Anyone who's been doing Sitecore DXP for a while will be fairly comfortable with Solr and how search works under the Content Search APIs. But if you're moving to the newer SaaS products then you're not working with that any more. And getting started with Sitecore's SaaS Search product does involve learning a few changed concepts.
Here are four quick things they tell you that you might not have thought too much about, but you need to remember to help avoid project surprises...
For a long time a small thing in writing Razor code for Sitecore (and in some other places) has irritated me. It's not really very important, but with the new version of C# there is finally a way to round off this rough edge that's been getting to me...