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[Btcc22]

LGA 2011 is more capable than LGA 1155 ever could be.

I would hope that a newer and more expensive technology would be more capable, even if most of the additions are of no use to the majority of users.

The i7-3820 was the same price as the i7-2700K, the board was $220 versus $250 for the same tier board with the closest possible features

Your cost comparisons are quite unfair. The 2700k carried a premium for nothing more than a shot at reaching slightly higher overclocks, although the evidence I've seen indicates that it was a complete waste of money, offering zero benefit over the 2600k. Not really a surprise since they're the same chip.

On top of that, some of the K series CPUs will achieve better performance after overclocking. If you're not going to overclock it, you may as well have gone for the cheaper models.

Besides, the cost difference of a quality 1155 setup versus a quality 2011 setup is negligible

You priced up the most expensive LGA1155 build you could put together against probably the cheapest LGA2011 build and convinced yourself that you were getting value. You could have put together an LGA1155 build for a much lower price with very little performance loss. Once you reach the high-end, you pay a massive premium for negligible performance gains.

those with LGA1155 platforms will have to be building completely new computers

Doubt it. I think LGA1155 will continue to serve well for quite a while yet.