What are the current visa extension rules and tourist visa options for Thailand?

Visa exempt extentions are still 30 days but that will depend on how many visa exemptions you've had and as always dependent on the Immigration Officer dealing with your application.

Tourist visas are still and always have been 60 days(they are valid to use for 90 days from the date of issue), apart from the DTV which is 180 days.

1. I’ve heard that visa extensions at Immigration can now only be extended for 7 days instead of 30 days. Is this true?

Not true - this only applies to someone with multiple Visa Exempt entries withing the last year especially by border bouncing

2. If applying for a tourist visa in Laos, is it still possible to get a 3-month visa?

Yes you can get a TR60 which is valid for 90 days and gets you a 60 day entry stamp then a 30 day extension

Are you not Thai?

You can still get a 30 days extension, but practice has changed. If it is your first visa exemption in the relevant cycle, you can still obtain the full 60 days on entry and extend by 30 days, giving 90 days in total. If, however, you have already received a 30 days extension on a previous visa exemption within the same calendar year or cycle, many immigration offices now grant only a 7 days extension on the next one. This is how the new formalised guidelines are being applied in practice, not a formal abolition of 30 days extensions. Applying for a tourist visa in Laos is still possible and can give slightly higher certainty if you have several recent entries, with 60 days on entry and a further 30 days extension. ED visas are still available, but scrutiny is higher and applications must clearly show genuine study. Nothing has been removed, but repeat short term stays under the Visa exemption system itself are being assessed more strictly.

A tourist visa is not 90 days it only 60 days then you need to try get the extension to give you the extra 30 days.

The first extension on first entry is 30 days and the extension on 2nd entry is apparently only 7 days