For those with past web stack exp 20-30+ yrs) 'without' modern web stack experience. How do you stand out for those job listings requiring modern stack? How do

For those with past web stack exp 20-30+ yrs) 'without' modern web stack experience. How do you stand out for those job listings requiring modern stack? How do you tie those past experiences to remove such disconnect? Hiring manager's looking for React in next role. Would you prefer to someone with lots of experience (old ways) or someone expert in React with few years. Looking for context.