Beyond the Headlines: What Are the Real Technical Breakthroughs in Top 100 Cryptocurrencies Over the Last 4 Years?

We all know the big headlines, but what about the actual technical improvements that rarely get discussed? I'm curious to hear about the major breakthroughs that have happened in the last 4 years for the top 100 cryptocurrencies (excluding the memes).

For instance, Ethereum has seen several significant updates, such as the Berlin update in April 2021, which aimed to reduce transaction fees. This eventually led to the Ethereum Merge in 2022, transitioning the network from proof-of-work to proof-of-stake, further reducing gas prices and improving scalability.

What other innovations or advancements have truly pushed the boundaries and made a significant impact on the crypto space?

Looking forward to your insights!