Sequoia Capital on Tuesday announced that Alfred Lin and Pat Grady will be elevated to firm stewards, succeeding Roelof Botha.Why it matters: Sequoia is one of Silicon Valley's oldest and most successful venture capital firms.It's also managed a series of management successions, owing to a stewardship tradition set by firm founder Don Valentine — at a time when many VC firms used founder names as their brands.Catch up quick: Botha, PayPal's original CFO, had been a Sequoia steward since 2017 and...