Comparatively, Twitter doesn't have the same user base as Instagram, Facebook, or WhatsApp, and I think that extending the character limit is a way of making Twitter more accessible for first-time users.
It's also designed to bring more brands to Twitter. Right now it's extremely difficult to promote your brand/business, include a photo, @ mention someone, and include a hashtag. An extended character limit solves all of these problems, making it a more attractive platform for advertising than ever before.
Comparatively, Twitter doesn't have the same user base as Instagram, Facebook, or WhatsApp, and I think that extending the character limit is a way of making Twitter more accessible for first-time users.
It's also designed to bring more brands to Twitter. Right now it's extremely difficult to promote your brand/business, include a photo, @ mention someone, and include a hashtag. An extended character limit solves all of these problems, making it a more attractive platform for advertising than ever before.