There's nothing "these days" about the idea: that's how all debt should be looked at. How much in interest will it cost you, and are the benefits you get worth that cost?
Borrowing money at 2-4% to build water/sewers infrastructure so your population does not die, and thus allows for better economic growth, can pay for the borrowed money easily. Or roads, bridges, rail, schools, scientific research, etc.
If you're borrowing money because you have low revenues due to tax cuts (especially in top tax brackets), then perhaps your ROI won't be as good.
Deficit spending causes inflation, and that type of inflation is a hidden, regressive form of taxation. It hits everybody, but the poorest suffer most when all the essentials get more expensive. The government creates new money, but really the value of that money comes out of everybody's income and bank accounts.
If additional government spending is truly necessary, it should be funded through transparent, progressive taxation, so that it only affects those who can afford to pay the tax, and so that the voting public is aware of it.
Unforunately, you're unlikely to win an election on the promise of raising taxes. The hidden tax of inflation, on the other hand, is so perfectly hidden in plain sight that most people don't notice it unless it gets out of hand.