the modern era looks like such boredom that it won't be worth it.
The idiots still haven't figured out why civ 4 added corporations and global warming(even though they were not utilized fully).
As a lazy Immortal player who tends to get bored about the modern era of Civ since 2, I was bored of it in 4 as well since it's usually the mop-up pace or I have already gotten a winning position by the Industrial age, and most of the tedium related to the modern era (micromanaging production and unit movement in pretty much every turn, massive slowdowns on potato computers, AI incapable of dealing with mass tanks / helicopters / bombardment at all) doesn't really go away. I don't think they ever got it right, the issue mostly stems from that you usually have already won before the modern era rolls around.
And to emphasize that I'm lazy, corporations were pretty much designed to get people away from running State Property as the ultimate end-game civic instead giving you more choice. But since I'm a lazy bastard and they also gave minor buffs to State Property to ensure you do have that late-game choice, I just ended up happily reaping the instant benefits of being a Commie instead of going corporations. The latter choice does get stronger than SP with enough investment, but by that point I probably have a few Cavalry regiments in every major capital in the world.
This is incidentally also why I thought Civ5 had a decent idea for Americans and Germans to no longer tie up their unique unit to an era very few people care about (yeah Navy SEALs and Panzers of IV are strong, but pretty much never end up being the cornerstone of victory in a game where Egypt's bullshit chariots can win before a late game civ's strengths become relevant, and where the first 200~ turns are the most impactful) by giving them the Minutemen and the Landsknecht, which is nice because historically throughout the Civ series a lot of game-winning pushes play out around Renaissance/Industrial when the player suddenly gets a major tech spike that they can utilize better than the AI (massive improvements to the offense stat and mobility, ability to lay railroads). And then in Civ6 you get the Mustang and the U-Boot on either side. For what purpose?
Anyway tl;dr: from a gamist perspective, the modern era has always had design issues in Civ, I always thought it was boring.