The initial response to the proposition of doing 100-inch straight cuts with a cordless oscillating saw will be "are you mad?", but I still wonder.
I'm just starting out in DIY and decided to get a jigsaw for versatility. It can do flexible, it can do long straight cuts if you clamp on a guide (although it will be slow), etc.
And then a friend suggested I consider an oscillating multi-tool. It's far from ideal for the job, he said, but it adds a whole bunch of other features that a jigsaw can't do. And so it might be a much more versatile initial purchase. Even with 2x 100-inch MDF cuts needed in an upcoming project. Although he guesses it would be painful to do those long cuts, I would be left with a much more versatile tool he thinks I will end up using more than a jigsaw. And given the fact that I don't know how serious my DIY-ing will be in the future, it might be a better purchase.
I'm wondering what you guys think about this proposition. Does his rationale make sense?