Do Lightning Web Components operate in their own transaction when it comes to SOQL query limits? For example, if I have a Lightning Page with several LWCs, can I focus on each LWC as a single entity with it's own transaction limits or do I need to be aware of the number of SOQL calls from each LWC?
Also a more general question in regards to best practices. If I need to summarize data from both the entire set of instances of an object, and a subset(s) of the instances, is it better to do a single SOQL query and iterate over the instances to calculate the summary values? Or is it better to issue two (or more) separate SOQL queries? I realize the answer here is probably contextual, but I'm never come across any guidelines from Salesforce.