If you are younger, your years of experience do impact your buy side job search.
Recruiters typically put candidates into buckets based on their years of experience. The buckets are 1-2 years, 3-5 years, 5-7 years, 7-10 years, and 10 years plus. LinkedIn also uses these buckets to search people based on their experience.
Why do recruiters and LinkedIn use these buckets? Because they match the broad titles at an asset management firm or hedge fund. The titles they want to fill are junior analyst, analyst, senior analyst / vice president, portfolio manager, and executive / partner.
If you are targeting the junior analyst or analyst roles, the years of experience matter more. If you want to target a title that typically has 1-2 years less experience required, then there could be several issues. Would you be willing to take a step down in salary? Do you have the same stamina to meet project deadlines as someone younger than you? Do you mind reporting to a manager who could be younger than you?
These issues are why recruiters / firms are sensitive to hire within the work experience range at the junior analyst to senior analyst levels.
Work experience matters a lot less at the 10+ years level when the role to fill is at portfolio manager and above. The pay, stamina, reporting issues are non-existent. There are a lot fewer qualified candidates at this level, and the goal is to find the best talent.