fuck stack and reach, the worse way to figure out IMO, its all 'reach' based and biomechanics change all the time, your core can get stronger/weaker, supporting muscles the same. IMO ST angle is more critical. The rest is 'ride feel'.
heard through the grape vine you can get modular geometry for stack and reach if your bike is compatible with "spacers" and "stems" - might be newer tech so would check with your bikes manual
Much more practical for cyclists looking for high end bikes to concentrate on immutable characteristics like ST angle / stack / reach instead of spacers / stems or god forbid stretching or planking
Unless the bike is titanium which is of course a bike for life
fuck stack and reach, the worse way to figure out IMO, its all 'reach' based and biomechanics change all the time, your core can get stronger/weaker, supporting muscles the same. IMO ST angle is more critical. The rest is 'ride feel'.