Over optimism and under optimism frequently shifts - https://www.buoyantcap.com/2020/11/06/saas-one-who-has-never-sinned-and-tech-valuations/
Nykaa - Why it requires a horizon to visualize 10-15 years if you are valuing a young tech backed high growth company - https://fy41guy.blogspot.com/2021/10/finance-gurus-on-twitter-pranam-this-is.html