💣 DISCLAIMER: This is an un-official collection of resources and thoughts written by Alex D. (Parity Success/Pre-sales) during the projects he managed in Parity, working on delivering recently announced 'Plaza upgrade' that will include smart contracts and EVM compatibility to Polkadot. Please consider this as an open-source community contribution, rather than official collateral belonging to Parity Technologies.
This document can serve as both:
Officially launched in 2021, Polkadot was leading the way in trying to deliver a scalable and interoperable “blockchain of blockchains” ecosystem; introducing the world with a superior technology that consisted of:

In simple words, Polkadot was first to introduce a technological innovation of rollups (i.e. parachains). There are no ‘slower’ optimistic finality, nor infrastructure-heavy ZK approaches(compute and costs).
:boohoo: ZK/OP rollups
In a pure technological sense - Polkadot wins. ⭕

However, with every innovation and supremacy, comes a big challenge of adoption.
Many have considered that Polkadot ‘missed the mark’ because it lacks positioning in KPIs such as DeFi (liquidity, TVL, volume), but also more commercial-facing dApp adoption, and ‘hyped’ network effects.

Driven by analysing these weak spots, here’s a shot at demystifying the reasoning for that: