Yeah, you might get more transactions per block without increasing the size too much, but to think that gives a significant advantage over account-based chains is just drinking the kool-aid.
Whenever you see someone selling you the idea that there will be a massively decentralized blockchain that can reach a high number of TPS without scaling off-chain, run in the other direction.
To put another way: if UTXO was paramount for scaling, there would be no need for BSV to exist because BTC (and BCH, LTC, Monero, Doge and so many others) are already based on UTXO.
There are many other, bigger challenges and trade-offs to be considering when planning for scaling solutions. All of the solutions claiming they are scaling base-layer chains are doing so at the cost of centralization. Solana claims to make 100k+ TPS, but the amount of hardware required is incredibly expensive. Binance Chain manages to scale because it uses only 8 validator nodes. BSV is making these jumbo blocks, so the moment the network becomes popular it could be requiring 20-30GB per hour in storage, who in their right mind will want to run one of those?