Part 5/9:
When discussing scalability in Bitcoin's UTXO model, attention must turn to the current software architectures deployed to maintain and validate the blockchain. Critiques point out that platforms like Bitcoin Core underutilize available hardware, failing to optimize transaction validation's computational resources adequately.
A deeper exploration of transaction processing unveils that while signature checks remain computationally intensive, parallelization across multiple CPU cores greatly eases the burden. However, inherent bottlenecks do exist—a limitation felt most significantly during high-demand scenarios.