18 y/o – stable hairline with topical fin (Fynzur), Minoxidil & Dermastamp – add oral Finasteride as prevention?

I’m currently 18 (turning 19 in 3 months).

Family history:

No aggressive genetic hair loss.

My father is 63 and around Norwood 3 vertex.

My maternal uncles are around 40 and all approximately Norwood 2.

Current regimen:

  • Minoxidil: ~1 year 10 months

  • Fynzur spray (topical finasteride): 6 months

  • Dermastamp: ~1 year 10 months, 1 mm once per week

With this routine I’m able to maintain my hairline.

No diffuse thinning, only hairline involvement.

I often read that starting oral finasteride early gives better long-term protection and prevents future loss before it becomes visible.

Given that my hairline is currently stable, would adding oral finasteride purely as a preventative make sense, or is it unnecessary at this stage considering my family history and current response to topical finasteride?

Looking for input from people who started finasteride young or chose to delay it.

Photos: Last 3 photos are from May 14, the remaining ones are from 3 days ago.