High usage of the Bitcoin network can be seen as both positive and negative, depending on the context and perspective.

Positive Aspects: High transaction volume can indicate growing adoption and use of Bitcoin as a means of transferring value and conducting financial transactions. This can be a sign of increased interest and utility in the cryptocurrency.

Negative Aspects: On the downside, a congested mempool with high transaction fees may hinder small-value and everyday transactions, making Bitcoin less practical for microtransactions. It can also lead to slower confirmation times for transactions, which might not be ideal for time-sensitive payments.

I would say anything less than 15sat/vB is considered low fee and if we're able to reach record transactions at a low fee, it's a win in my eyes.