This is the best few tens of billions years in the history of the universe to do cosmology. - Nima Arkani-Hamed

... nature has very few good ideas — it recycles them in subtle and interesting ways, over and over again — and it's our job to understand how that works.

There are still many open questions that need answering: Why does gravity defy the notion of space-time in short distances? Why are there humongous quantum fluctuations in shorter distances? How is a larger Universe possible? These questions relate to the hierarchy problem and fine tuning and are divided into two stages. First, one should ask: “Why is there a macroscopic Universe that is not broken in the Planck scale,” and second: “Why are there large scale structures in the large Universe and they are not broken into Planck scale black holes?”

The hierarchy problem is the elephant in the room. ... And it originally showed up in the context of doublet–triplet splitting problem.