It's getting harder and harder to become a dual citizen.
And even though most countries want to attract high-level people that are putting a substantial amount of money on their bank accounts or buying real estate, they are making it harder on a lower level.
In other words, they are tightening their citizenship laws in order to make it difficult to naturalize and get a passport. This is thanks to abuse of the system, but it impacts law-abiding passport seekers, too.
The best time to start working on your second passport strategy is NOW, because the cheapest and easiest options may become unreliable as the trend makes second citizenship harder to get.