Tons and tons of employers will still require or expect a cover letter. At least in the US.
Résumé guidance is all over the place and I think largely comes down to the reader's preferences, which are wildly inconsistent, so there's no such thing as the One Best Résumé layout and/or length. See a sibling post claiming that a one-pager is a "red flag".
None of this is scientific and every single thing you do during an application and interview process can easily be one hiring manager's "best practice" and another's "red flag". It's a minefield, because it's all basically arbitrary but many people in the hiring process will have strong feelings about various unimportant details, regardless, because they're just casting about for some signal in all the noise, such that they end up taking a lot of the noise as signal.
Résumé guidance is all over the place and I think largely comes down to the reader's preferences, which are wildly inconsistent, so there's no such thing as the One Best Résumé layout and/or length. See a sibling post claiming that a one-pager is a "red flag".
None of this is scientific and every single thing you do during an application and interview process can easily be one hiring manager's "best practice" and another's "red flag". It's a minefield, because it's all basically arbitrary but many people in the hiring process will have strong feelings about various unimportant details, regardless, because they're just casting about for some signal in all the noise, such that they end up taking a lot of the noise as signal.