History has limitless time to evaluate her life and effects on British politics; the funeral is the closing of one chapter and the beginning of that process.
The note today is that she was 54 when she became Prime Minister. She didn't think "I've put 30 years in, I've led this party back in to power, I'll do two years and then plead illness, get a nice little country estate, go and spend some fun time with my money".
Instead, she did her best to lead the country. Everybody has their own opinion about how that went, and tomorrow that can be argued about. But today her example is that being over 50 has its drawbacks but it also has experience, fortitude and the possibility that the greater works may be done later in life because one finally has the knowledge of how to do them.
She has earned her rest.
H/T Ambush Predator