Yes. Baseline is essentially the line below which demand doesn't drop.
A problem with renewables is that they still need storage to work as peakers, because in many places renewable production doesn't happen in peak times.
So, is below baseline powered by gas and coal? If so, why? Wouldn't it make more sense to cover as much as you can with renewables, including as much below and above the baseline, then cover the rest with gas for now and HVDC/storage/demand shifting/.. later?
I.e. calculate demand - renewables. Cover that. Don't see the point of baseline.
You do realize that every country is already doing what you are suggesting? The point however is that unreliable renewables doesn't cover anything at all reliably, so you need reliable power to cover 100% of demand or you will have regular blackouts. You can achieve that by having enough battery storage to fuel the whole country for months to last the whole winter, or you build reliable power plants like nuclear, coal or gas. We aren't even close to having the battery solution even within decades, so the only alternative are the unrenewable power plants.
And no, betting on a good winter isn't a solution. If those batteries runs out and large swathes of the country blacks out for months during a cold winter many will die. That is not a good solution.
Using batteries to get renewables to 100% is bad systems engineering. It's cheaper to use something like hydrogen for the last 10-20%, and for seasonal load leveling.
If you notice, you have mentioned baseload, baseload power generation, baseload demand or base-anything exactly 0 times, because it has near 0 relevance, which is the point of the entire discussion.
A problem with renewables is that they still need storage to work as peakers, because in many places renewable production doesn't happen in peak times.